浮点数计算

pkg/common/function.go

@@ -9,10 +9,6 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
-	"github.com/gin-gonic/gin"
-	"github.com/gogf/gf/util/gconv"
-	"github.com/syyongx/php2go"
-	"github.com/tidwall/gjson"
 	"go_sku_server/pkg/config"
 	"go_sku_server/pkg/vars"
 	"math"
@@ -24,6 +20,12 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/gogf/gf/util/gconv"
+	"github.com/shopspring/decimal"
+	"github.com/syyongx/php2go"
+	"github.com/tidwall/gjson"
 )
 
 /*
@@ -601,3 +603,9 @@ func MyRound(x float64, wei int) float64 {
 }
 
 ////////////类型转换/////////////////////
+
+//浮点数乘法
+func MulFloat(x float64, y float64) float64 {
+	result, _ := decimal.NewFromFloat(x).Mul(decimal.NewFromFloat(y)).Float64()
+	return result
+}

service/service_ly_common.go

@@ -420,7 +420,6 @@ func (ls *LyService) GetCoefficientAndPrice(sku model.LySku) model.LySku {
 		if !hasCoefficient {
 			coefficient = defaultCoefficient
 		}
-
 		fmt.Println("供应商系数 : ", coefficient)
 
 		//下面是计算价格
@@ -445,9 +444,13 @@ func (ls *LyService) GetCoefficientAndPrice(sku model.LySku) model.LySku {
 				}
 			}
 			//美金成本价
-			priceCostUs := common.MyRound(price.PriceUs*usDiscountRatio, 4)
+			priceCostUs := common.MulFloat(price.PriceUs, usDiscountRatio)
+			fmt.Println(priceCostUs)
+			priceCostUs = common.MyRound(priceCostUs, 4)
 			//美金售价
-			priceUs := priceCostUs * priceRatio.RatioUsd
+			priceUs := common.MulFloat(priceCostUs, priceRatio.RatioUsd)
+			// priceUs := priceCostUs * priceRatio.RatioUsd
+			fmt.Println(priceUs)
 			//人民币成本价
 			priceCostCn := common.MyRound(price.PriceUs*coefficient.Ratio*cnDiscountRatio*tax, 4)
 			//人民币售价