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ed9417195c
2. 修复持仓盈亏百分比错误,计算公式应该加入杠杆倍数
682 lines
20 KiB
Go
682 lines
20 KiB
Go
package trader
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import (
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"context"
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"encoding/json"
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"fmt"
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"log"
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"strconv"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/sonirico/go-hyperliquid"
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)
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// HyperliquidTrader Hyperliquid交易器
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type HyperliquidTrader struct {
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exchange *hyperliquid.Exchange
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ctx context.Context
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walletAddr string
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meta *hyperliquid.Meta // 缓存meta信息(包含精度等)
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}
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// NewHyperliquidTrader 创建Hyperliquid交易器
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func NewHyperliquidTrader(privateKeyHex string, walletAddr string, testnet bool) (*HyperliquidTrader, error) {
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// 解析私钥
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privateKey, err := crypto.HexToECDSA(privateKeyHex)
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if err != nil {
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return nil, fmt.Errorf("解析私钥失败: %w", err)
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}
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// 选择API URL
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apiURL := hyperliquid.MainnetAPIURL
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if testnet {
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apiURL = hyperliquid.TestnetAPIURL
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}
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// // 从私钥生成钱包地址
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// pubKey := privateKey.Public()
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// publicKeyECDSA, ok := pubKey.(*ecdsa.PublicKey)
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// if !ok {
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// return nil, fmt.Errorf("无法转换公钥")
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// }
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// walletAddr := crypto.PubkeyToAddress(*publicKeyECDSA).Hex()
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ctx := context.Background()
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// 创建Exchange客户端(Exchange包含Info功能)
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exchange := hyperliquid.NewExchange(
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ctx,
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privateKey,
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apiURL,
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nil, // Meta will be fetched automatically
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"", // vault address (empty for personal account)
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walletAddr, // wallet address
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nil, // SpotMeta will be fetched automatically
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)
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log.Printf("✓ Hyperliquid交易器初始化成功 (testnet=%v, wallet=%s)", testnet, walletAddr)
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// 获取meta信息(包含精度等配置)
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meta, err := exchange.Info().Meta(ctx)
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if err != nil {
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return nil, fmt.Errorf("获取meta信息失败: %w", err)
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}
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return &HyperliquidTrader{
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exchange: exchange,
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ctx: ctx,
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walletAddr: walletAddr,
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meta: meta,
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}, nil
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}
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// GetBalance 获取账户余额
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func (t *HyperliquidTrader) GetBalance() (map[string]interface{}, error) {
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log.Printf("🔄 正在调用Hyperliquid API获取账户余额...")
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// 获取账户状态
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accountState, err := t.exchange.Info().UserState(t.ctx, t.walletAddr)
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if err != nil {
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log.Printf("❌ Hyperliquid API调用失败: %v", err)
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return nil, fmt.Errorf("获取账户信息失败: %w", err)
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}
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// 解析余额信息(MarginSummary字段都是string)
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result := make(map[string]interface{})
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// 🔍 调试:打印API返回的完整CrossMarginSummary结构
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summaryJSON, _ := json.MarshalIndent(accountState.MarginSummary, " ", " ")
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log.Printf("🔍 [DEBUG] Hyperliquid API CrossMarginSummary完整数据:")
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log.Printf("%s", string(summaryJSON))
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accountValue, _ := strconv.ParseFloat(accountState.MarginSummary.AccountValue, 64)
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totalMarginUsed, _ := strconv.ParseFloat(accountState.MarginSummary.TotalMarginUsed, 64)
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// ⚠️ 关键修复:从所有持仓中累加真正的未实现盈亏
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totalUnrealizedPnl := 0.0
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for _, assetPos := range accountState.AssetPositions {
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unrealizedPnl, _ := strconv.ParseFloat(assetPos.Position.UnrealizedPnl, 64)
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totalUnrealizedPnl += unrealizedPnl
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}
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// ✅ 正确理解Hyperliquid字段:
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// AccountValue = 总账户净值(已包含空闲资金+持仓价值+未实现盈亏)
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// TotalMarginUsed = 持仓占用的保证金(已包含在AccountValue中,仅用于显示)
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//
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// 为了兼容auto_trader.go的计算逻辑(totalEquity = totalWalletBalance + totalUnrealizedProfit)
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// 需要返回"不包含未实现盈亏的钱包余额"
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walletBalanceWithoutUnrealized := accountValue - totalUnrealizedPnl
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result["totalWalletBalance"] = walletBalanceWithoutUnrealized // 钱包余额(不含未实现盈亏)
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result["availableBalance"] = accountValue - totalMarginUsed // 可用余额(总净值 - 占用保证金)
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result["totalUnrealizedProfit"] = totalUnrealizedPnl // 未实现盈亏
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log.Printf("✓ Hyperliquid 账户: 总净值=%.2f (钱包%.2f+未实现%.2f), 可用=%.2f, 保证金占用=%.2f",
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accountValue,
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walletBalanceWithoutUnrealized,
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totalUnrealizedPnl,
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result["availableBalance"],
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totalMarginUsed)
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return result, nil
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}
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// GetPositions 获取所有持仓
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func (t *HyperliquidTrader) GetPositions() ([]map[string]interface{}, error) {
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// 获取账户状态
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accountState, err := t.exchange.Info().UserState(t.ctx, t.walletAddr)
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if err != nil {
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return nil, fmt.Errorf("获取持仓失败: %w", err)
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}
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var result []map[string]interface{}
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// 遍历所有持仓
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for _, assetPos := range accountState.AssetPositions {
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position := assetPos.Position
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// 持仓数量(string类型)
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posAmt, _ := strconv.ParseFloat(position.Szi, 64)
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if posAmt == 0 {
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continue // 跳过无持仓的
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}
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posMap := make(map[string]interface{})
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// 标准化symbol格式(Hyperliquid使用如"BTC",我们转换为"BTCUSDT")
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symbol := position.Coin + "USDT"
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posMap["symbol"] = symbol
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// 持仓数量和方向
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if posAmt > 0 {
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posMap["side"] = "long"
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posMap["positionAmt"] = posAmt
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} else {
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posMap["side"] = "short"
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posMap["positionAmt"] = -posAmt // 转为正数
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}
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// 价格信息(EntryPx和LiquidationPx是指针类型)
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var entryPrice, liquidationPx float64
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if position.EntryPx != nil {
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entryPrice, _ = strconv.ParseFloat(*position.EntryPx, 64)
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}
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if position.LiquidationPx != nil {
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liquidationPx, _ = strconv.ParseFloat(*position.LiquidationPx, 64)
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}
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positionValue, _ := strconv.ParseFloat(position.PositionValue, 64)
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unrealizedPnl, _ := strconv.ParseFloat(position.UnrealizedPnl, 64)
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// 计算mark price(positionValue / abs(posAmt))
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var markPrice float64
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if posAmt != 0 {
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markPrice = positionValue / absFloat(posAmt)
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}
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posMap["entryPrice"] = entryPrice
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posMap["markPrice"] = markPrice
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posMap["unRealizedProfit"] = unrealizedPnl
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posMap["leverage"] = float64(position.Leverage.Value)
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posMap["liquidationPrice"] = liquidationPx
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result = append(result, posMap)
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}
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return result, nil
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}
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// SetLeverage 设置杠杆
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func (t *HyperliquidTrader) SetLeverage(symbol string, leverage int) error {
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// Hyperliquid symbol格式(去掉USDT后缀)
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coin := convertSymbolToHyperliquid(symbol)
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// 调用UpdateLeverage (leverage int, name string, isCross bool)
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_, err := t.exchange.UpdateLeverage(t.ctx, leverage, coin, false) // false = 逐仓模式
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if err != nil {
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return fmt.Errorf("设置杠杆失败: %w", err)
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}
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log.Printf(" ✓ %s 杠杆已切换为 %dx", symbol, leverage)
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return nil
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}
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// OpenLong 开多仓
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func (t *HyperliquidTrader) OpenLong(symbol string, quantity float64, leverage int) (map[string]interface{}, error) {
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// 先取消该币种的所有委托单
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if err := t.CancelAllOrders(symbol); err != nil {
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log.Printf(" ⚠ 取消旧委托单失败: %v", err)
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}
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// 设置杠杆
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if err := t.SetLeverage(symbol, leverage); err != nil {
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return nil, err
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}
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// Hyperliquid symbol格式
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coin := convertSymbolToHyperliquid(symbol)
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// 获取当前价格(用于市价单)
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price, err := t.GetMarketPrice(symbol)
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if err != nil {
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return nil, err
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}
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// ⚠️ 关键:根据币种精度要求,四舍五入数量
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roundedQuantity := t.roundToSzDecimals(coin, quantity)
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log.Printf(" 📏 数量精度处理: %.8f -> %.8f (szDecimals=%d)", quantity, roundedQuantity, t.getSzDecimals(coin))
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// ⚠️ 关键:价格也需要处理为5位有效数字
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aggressivePrice := t.roundPriceToSigfigs(price * 1.01)
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log.Printf(" 💰 价格精度处理: %.8f -> %.8f (5位有效数字)", price*1.01, aggressivePrice)
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// 创建市价买入订单(使用IOC limit order with aggressive price)
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order := hyperliquid.CreateOrderRequest{
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Coin: coin,
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IsBuy: true,
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Size: roundedQuantity, // 使用四舍五入后的数量
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Price: aggressivePrice, // 使用处理后的价格
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OrderType: hyperliquid.OrderType{
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Limit: &hyperliquid.LimitOrderType{
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Tif: hyperliquid.TifIoc, // Immediate or Cancel (类似市价单)
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},
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},
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ReduceOnly: false,
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}
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_, err = t.exchange.Order(t.ctx, order, nil)
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if err != nil {
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return nil, fmt.Errorf("开多仓失败: %w", err)
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}
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log.Printf("✓ 开多仓成功: %s 数量: %.4f", symbol, roundedQuantity)
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result := make(map[string]interface{})
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result["orderId"] = 0 // Hyperliquid没有返回order ID
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result["symbol"] = symbol
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result["status"] = "FILLED"
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return result, nil
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}
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// OpenShort 开空仓
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func (t *HyperliquidTrader) OpenShort(symbol string, quantity float64, leverage int) (map[string]interface{}, error) {
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// 先取消该币种的所有委托单
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if err := t.CancelAllOrders(symbol); err != nil {
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log.Printf(" ⚠ 取消旧委托单失败: %v", err)
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}
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// 设置杠杆
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if err := t.SetLeverage(symbol, leverage); err != nil {
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return nil, err
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}
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// Hyperliquid symbol格式
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coin := convertSymbolToHyperliquid(symbol)
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// 获取当前价格
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price, err := t.GetMarketPrice(symbol)
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if err != nil {
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return nil, err
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}
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// ⚠️ 关键:根据币种精度要求,四舍五入数量
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roundedQuantity := t.roundToSzDecimals(coin, quantity)
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log.Printf(" 📏 数量精度处理: %.8f -> %.8f (szDecimals=%d)", quantity, roundedQuantity, t.getSzDecimals(coin))
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// ⚠️ 关键:价格也需要处理为5位有效数字
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aggressivePrice := t.roundPriceToSigfigs(price * 0.99)
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log.Printf(" 💰 价格精度处理: %.8f -> %.8f (5位有效数字)", price*0.99, aggressivePrice)
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// 创建市价卖出订单
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order := hyperliquid.CreateOrderRequest{
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Coin: coin,
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IsBuy: false,
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Size: roundedQuantity, // 使用四舍五入后的数量
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Price: aggressivePrice, // 使用处理后的价格
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OrderType: hyperliquid.OrderType{
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Limit: &hyperliquid.LimitOrderType{
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Tif: hyperliquid.TifIoc,
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},
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},
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ReduceOnly: false,
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}
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_, err = t.exchange.Order(t.ctx, order, nil)
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if err != nil {
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return nil, fmt.Errorf("开空仓失败: %w", err)
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}
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log.Printf("✓ 开空仓成功: %s 数量: %.4f", symbol, roundedQuantity)
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result := make(map[string]interface{})
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result["orderId"] = 0
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result["symbol"] = symbol
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result["status"] = "FILLED"
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return result, nil
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}
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// CloseLong 平多仓
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func (t *HyperliquidTrader) CloseLong(symbol string, quantity float64) (map[string]interface{}, error) {
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// 如果数量为0,获取当前持仓数量
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if quantity == 0 {
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positions, err := t.GetPositions()
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if err != nil {
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return nil, err
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}
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for _, pos := range positions {
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if pos["symbol"] == symbol && pos["side"] == "long" {
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quantity = pos["positionAmt"].(float64)
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break
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}
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}
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if quantity == 0 {
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return nil, fmt.Errorf("没有找到 %s 的多仓", symbol)
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}
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}
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// Hyperliquid symbol格式
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coin := convertSymbolToHyperliquid(symbol)
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// 获取当前价格
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price, err := t.GetMarketPrice(symbol)
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if err != nil {
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return nil, err
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}
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// ⚠️ 关键:根据币种精度要求,四舍五入数量
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roundedQuantity := t.roundToSzDecimals(coin, quantity)
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log.Printf(" 📏 数量精度处理: %.8f -> %.8f (szDecimals=%d)", quantity, roundedQuantity, t.getSzDecimals(coin))
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// ⚠️ 关键:价格也需要处理为5位有效数字
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aggressivePrice := t.roundPriceToSigfigs(price * 0.99)
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log.Printf(" 💰 价格精度处理: %.8f -> %.8f (5位有效数字)", price*0.99, aggressivePrice)
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// 创建平仓订单(卖出 + ReduceOnly)
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order := hyperliquid.CreateOrderRequest{
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Coin: coin,
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IsBuy: false,
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Size: roundedQuantity, // 使用四舍五入后的数量
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Price: aggressivePrice, // 使用处理后的价格
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OrderType: hyperliquid.OrderType{
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Limit: &hyperliquid.LimitOrderType{
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Tif: hyperliquid.TifIoc,
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},
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},
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ReduceOnly: true, // 只平仓,不开新仓
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}
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_, err = t.exchange.Order(t.ctx, order, nil)
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if err != nil {
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return nil, fmt.Errorf("平多仓失败: %w", err)
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}
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log.Printf("✓ 平多仓成功: %s 数量: %.4f", symbol, roundedQuantity)
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// 平仓后取消该币种的所有挂单
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if err := t.CancelAllOrders(symbol); err != nil {
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log.Printf(" ⚠ 取消挂单失败: %v", err)
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}
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result := make(map[string]interface{})
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result["orderId"] = 0
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result["symbol"] = symbol
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result["status"] = "FILLED"
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return result, nil
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}
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// CloseShort 平空仓
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func (t *HyperliquidTrader) CloseShort(symbol string, quantity float64) (map[string]interface{}, error) {
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// 如果数量为0,获取当前持仓数量
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if quantity == 0 {
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positions, err := t.GetPositions()
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if err != nil {
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return nil, err
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}
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for _, pos := range positions {
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if pos["symbol"] == symbol && pos["side"] == "short" {
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quantity = pos["positionAmt"].(float64)
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break
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}
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}
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if quantity == 0 {
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return nil, fmt.Errorf("没有找到 %s 的空仓", symbol)
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}
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}
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// Hyperliquid symbol格式
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coin := convertSymbolToHyperliquid(symbol)
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// 获取当前价格
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price, err := t.GetMarketPrice(symbol)
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if err != nil {
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return nil, err
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}
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// ⚠️ 关键:根据币种精度要求,四舍五入数量
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roundedQuantity := t.roundToSzDecimals(coin, quantity)
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log.Printf(" 📏 数量精度处理: %.8f -> %.8f (szDecimals=%d)", quantity, roundedQuantity, t.getSzDecimals(coin))
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// ⚠️ 关键:价格也需要处理为5位有效数字
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aggressivePrice := t.roundPriceToSigfigs(price * 1.01)
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log.Printf(" 💰 价格精度处理: %.8f -> %.8f (5位有效数字)", price*1.01, aggressivePrice)
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// 创建平仓订单(买入 + ReduceOnly)
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order := hyperliquid.CreateOrderRequest{
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Coin: coin,
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IsBuy: true,
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Size: roundedQuantity, // 使用四舍五入后的数量
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Price: aggressivePrice, // 使用处理后的价格
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OrderType: hyperliquid.OrderType{
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Limit: &hyperliquid.LimitOrderType{
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Tif: hyperliquid.TifIoc,
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},
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},
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ReduceOnly: true,
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}
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_, err = t.exchange.Order(t.ctx, order, nil)
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if err != nil {
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return nil, fmt.Errorf("平空仓失败: %w", err)
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}
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log.Printf("✓ 平空仓成功: %s 数量: %.4f", symbol, roundedQuantity)
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// 平仓后取消该币种的所有挂单
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if err := t.CancelAllOrders(symbol); err != nil {
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log.Printf(" ⚠ 取消挂单失败: %v", err)
|
||
}
|
||
|
||
result := make(map[string]interface{})
|
||
result["orderId"] = 0
|
||
result["symbol"] = symbol
|
||
result["status"] = "FILLED"
|
||
|
||
return result, nil
|
||
}
|
||
|
||
// CancelAllOrders 取消该币种的所有挂单
|
||
func (t *HyperliquidTrader) CancelAllOrders(symbol string) error {
|
||
coin := convertSymbolToHyperliquid(symbol)
|
||
|
||
// 获取所有挂单
|
||
openOrders, err := t.exchange.Info().OpenOrders(t.ctx, t.walletAddr)
|
||
if err != nil {
|
||
return fmt.Errorf("获取挂单失败: %w", err)
|
||
}
|
||
|
||
// 取消该币种的所有挂单
|
||
for _, order := range openOrders {
|
||
if order.Coin == coin {
|
||
_, err := t.exchange.Cancel(t.ctx, coin, order.Oid)
|
||
if err != nil {
|
||
log.Printf(" ⚠ 取消订单失败 (oid=%d): %v", order.Oid, err)
|
||
}
|
||
}
|
||
}
|
||
|
||
log.Printf(" ✓ 已取消 %s 的所有挂单", symbol)
|
||
return nil
|
||
}
|
||
|
||
// GetMarketPrice 获取市场价格
|
||
func (t *HyperliquidTrader) GetMarketPrice(symbol string) (float64, error) {
|
||
coin := convertSymbolToHyperliquid(symbol)
|
||
|
||
// 获取所有市场价格
|
||
allMids, err := t.exchange.Info().AllMids(t.ctx)
|
||
if err != nil {
|
||
return 0, fmt.Errorf("获取价格失败: %w", err)
|
||
}
|
||
|
||
// 查找对应币种的价格(allMids是map[string]string)
|
||
if priceStr, ok := allMids[coin]; ok {
|
||
priceFloat, err := strconv.ParseFloat(priceStr, 64)
|
||
if err == nil {
|
||
return priceFloat, nil
|
||
}
|
||
return 0, fmt.Errorf("价格格式错误: %v", err)
|
||
}
|
||
|
||
return 0, fmt.Errorf("未找到 %s 的价格", symbol)
|
||
}
|
||
|
||
// SetStopLoss 设置止损单
|
||
func (t *HyperliquidTrader) SetStopLoss(symbol string, positionSide string, quantity, stopPrice float64) error {
|
||
coin := convertSymbolToHyperliquid(symbol)
|
||
|
||
isBuy := positionSide == "SHORT" // 空仓止损=买入,多仓止损=卖出
|
||
|
||
// ⚠️ 关键:根据币种精度要求,四舍五入数量
|
||
roundedQuantity := t.roundToSzDecimals(coin, quantity)
|
||
|
||
// ⚠️ 关键:价格也需要处理为5位有效数字
|
||
roundedStopPrice := t.roundPriceToSigfigs(stopPrice)
|
||
|
||
// 创建止损单(Trigger Order)
|
||
order := hyperliquid.CreateOrderRequest{
|
||
Coin: coin,
|
||
IsBuy: isBuy,
|
||
Size: roundedQuantity, // 使用四舍五入后的数量
|
||
Price: roundedStopPrice, // 使用处理后的价格
|
||
OrderType: hyperliquid.OrderType{
|
||
Trigger: &hyperliquid.TriggerOrderType{
|
||
TriggerPx: roundedStopPrice,
|
||
IsMarket: true,
|
||
Tpsl: "sl", // stop loss
|
||
},
|
||
},
|
||
ReduceOnly: true,
|
||
}
|
||
|
||
_, err := t.exchange.Order(t.ctx, order, nil)
|
||
if err != nil {
|
||
return fmt.Errorf("设置止损失败: %w", err)
|
||
}
|
||
|
||
log.Printf(" 止损价设置: %.4f", roundedStopPrice)
|
||
return nil
|
||
}
|
||
|
||
// SetTakeProfit 设置止盈单
|
||
func (t *HyperliquidTrader) SetTakeProfit(symbol string, positionSide string, quantity, takeProfitPrice float64) error {
|
||
coin := convertSymbolToHyperliquid(symbol)
|
||
|
||
isBuy := positionSide == "SHORT" // 空仓止盈=买入,多仓止盈=卖出
|
||
|
||
// ⚠️ 关键:根据币种精度要求,四舍五入数量
|
||
roundedQuantity := t.roundToSzDecimals(coin, quantity)
|
||
|
||
// ⚠️ 关键:价格也需要处理为5位有效数字
|
||
roundedTakeProfitPrice := t.roundPriceToSigfigs(takeProfitPrice)
|
||
|
||
// 创建止盈单(Trigger Order)
|
||
order := hyperliquid.CreateOrderRequest{
|
||
Coin: coin,
|
||
IsBuy: isBuy,
|
||
Size: roundedQuantity, // 使用四舍五入后的数量
|
||
Price: roundedTakeProfitPrice, // 使用处理后的价格
|
||
OrderType: hyperliquid.OrderType{
|
||
Trigger: &hyperliquid.TriggerOrderType{
|
||
TriggerPx: roundedTakeProfitPrice,
|
||
IsMarket: true,
|
||
Tpsl: "tp", // take profit
|
||
},
|
||
},
|
||
ReduceOnly: true,
|
||
}
|
||
|
||
_, err := t.exchange.Order(t.ctx, order, nil)
|
||
if err != nil {
|
||
return fmt.Errorf("设置止盈失败: %w", err)
|
||
}
|
||
|
||
log.Printf(" 止盈价设置: %.4f", roundedTakeProfitPrice)
|
||
return nil
|
||
}
|
||
|
||
// FormatQuantity 格式化数量到正确的精度
|
||
func (t *HyperliquidTrader) FormatQuantity(symbol string, quantity float64) (string, error) {
|
||
coin := convertSymbolToHyperliquid(symbol)
|
||
szDecimals := t.getSzDecimals(coin)
|
||
|
||
// 使用szDecimals格式化数量
|
||
formatStr := fmt.Sprintf("%%.%df", szDecimals)
|
||
return fmt.Sprintf(formatStr, quantity), nil
|
||
}
|
||
|
||
// getSzDecimals 获取币种的数量精度
|
||
func (t *HyperliquidTrader) getSzDecimals(coin string) int {
|
||
if t.meta == nil {
|
||
log.Printf("⚠️ meta信息为空,使用默认精度4")
|
||
return 4 // 默认精度
|
||
}
|
||
|
||
// 在meta.Universe中查找对应的币种
|
||
for _, asset := range t.meta.Universe {
|
||
if asset.Name == coin {
|
||
return asset.SzDecimals
|
||
}
|
||
}
|
||
|
||
log.Printf("⚠️ 未找到 %s 的精度信息,使用默认精度4", coin)
|
||
return 4 // 默认精度
|
||
}
|
||
|
||
// roundToSzDecimals 将数量四舍五入到正确的精度
|
||
func (t *HyperliquidTrader) roundToSzDecimals(coin string, quantity float64) float64 {
|
||
szDecimals := t.getSzDecimals(coin)
|
||
|
||
// 计算倍数(10^szDecimals)
|
||
multiplier := 1.0
|
||
for i := 0; i < szDecimals; i++ {
|
||
multiplier *= 10.0
|
||
}
|
||
|
||
// 四舍五入
|
||
return float64(int(quantity*multiplier+0.5)) / multiplier
|
||
}
|
||
|
||
// roundPriceToSigfigs 将价格四舍五入到5位有效数字
|
||
// Hyperliquid要求价格使用5位有效数字(significant figures)
|
||
func (t *HyperliquidTrader) roundPriceToSigfigs(price float64) float64 {
|
||
if price == 0 {
|
||
return 0
|
||
}
|
||
|
||
const sigfigs = 5 // Hyperliquid标准:5位有效数字
|
||
|
||
// 计算价格的数量级
|
||
var magnitude float64
|
||
if price < 0 {
|
||
magnitude = -price
|
||
} else {
|
||
magnitude = price
|
||
}
|
||
|
||
// 计算需要的倍数
|
||
multiplier := 1.0
|
||
for magnitude >= 10 {
|
||
magnitude /= 10
|
||
multiplier /= 10
|
||
}
|
||
for magnitude < 1 {
|
||
magnitude *= 10
|
||
multiplier *= 10
|
||
}
|
||
|
||
// 应用有效数字精度
|
||
for i := 0; i < sigfigs-1; i++ {
|
||
multiplier *= 10
|
||
}
|
||
|
||
// 四舍五入
|
||
rounded := float64(int(price*multiplier+0.5)) / multiplier
|
||
return rounded
|
||
}
|
||
|
||
// convertSymbolToHyperliquid 将标准symbol转换为Hyperliquid格式
|
||
// 例如: "BTCUSDT" -> "BTC"
|
||
func convertSymbolToHyperliquid(symbol string) string {
|
||
// 去掉USDT后缀
|
||
if len(symbol) > 4 && symbol[len(symbol)-4:] == "USDT" {
|
||
return symbol[:len(symbol)-4]
|
||
}
|
||
return symbol
|
||
}
|
||
|
||
// absFloat 返回浮点数的绝对值
|
||
func absFloat(x float64) float64 {
|
||
if x < 0 {
|
||
return -x
|
||
}
|
||
return x
|
||
}
|