feat 初始化

utils/number.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"github.com/shopspring/decimal"
 	"math/rand"
 	"strconv"
 )
@@ -26,3 +27,86 @@ func StringToInt64(s string) int64 {
 func Int64ToString(i int64) string {
 	return strconv.FormatInt(i, 10)
 }
+
+// AddFloat64 对浮点数求和
+func AddFloat64(places int32, number ...float64) float64 {
+	if len(number) == 0 {
+		return 0
+	}
+	result := decimal.NewFromFloat(0)
+	for _, n := range number {
+		result = result.Add(decimal.NewFromFloat(n))
+	}
+	return result.Round(places).InexactFloat64()
+}
+
+// SubFloat64 对浮点数求差
+func SubFloat64(places int32, number ...float64) float64 {
+	if len(number) == 0 {
+		return 0
+	}
+	result := decimal.NewFromFloat(number[0])
+	for i := 1; i < len(number); i++ {
+		result = result.Sub(decimal.NewFromFloat(number[i]))
+	}
+	return result.Round(places).InexactFloat64()
+}
+
+// MulFloat64 对浮点数求积
+func MulFloat64(places int32, number ...float64) float64 {
+	if len(number) == 0 {
+		return 0
+	}
+	result := decimal.NewFromFloat(1)
+	for _, n := range number {
+		result = result.Mul(decimal.NewFromFloat(n))
+	}
+	return result.Round(places).InexactFloat64()
+}
+
+// DivFloat64 对浮点数求商
+func DivFloat64(places int32, number ...float64) float64 {
+	if len(number) == 0 {
+		return 0
+	}
+	result := decimal.NewFromFloat(number[0])
+	for i := 1; i < len(number); i++ {
+		if number[i] == 0 {
+			return 0 // 避免除以零
+		}
+		result = result.Div(decimal.NewFromFloat(number[i]))
+	}
+	return result.Round(places).InexactFloat64()
+}
+
+// MaxInt32 返回两个 int32 中的较大值
+func MaxInt32(a, b int32) int32 {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+// MinInt32 返回两个 int32 中的较小值
+func MinInt32(a, b int32) int32 {
+	if a < b {
+		return a
+	}
+	return b
+}
+
+// MaxFloat64 返回两个 float64 中的较大值
+func MaxFloat64(a, b float64) float64 {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+// MinFloat64 返回两个 float64 中的较小值
+func MinFloat64(a, b float64) float64 {
+	if a < b {
+		return a
+	}
+	return b
+}