update

business/utils/commonUtil.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"github.com/kataras/iris/v12/context"
 	"io"
+	"math"
 	"pet-house.com/business/models"
 	"time"
 )
@@ -112,3 +113,7 @@ func GetStrDays(day int, minute int, reserveMap map[string]models.ReserveTimeFil
 	}
 	return dayHoursMap
 }
+
+func RoundToOneDecimalPlace(value float64) float64 {
+	return math.Round(value*10) / 10
+}

business/utils/commonUtil_test.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"math"
 	"pet-house.com/business/models"
+	"strconv"
 	"testing"
 )
 
@@ -30,3 +31,26 @@ func TestCalc1(t *testing.T) {
 	i := float64(85) / 100
 	fmt.Println(i)
 }
+
+func roundToOneDecimalPlace(value float64) float64 {
+	return math.Round(value*10) / 10
+}
+
+func TestCalc3(t *testing.T) {
+	i := float64(348) * 0.95
+	fmt.Println(i)
+}
+func TestCalc4(t *testing.T) {
+	value := 267.77
+	roundedValue := roundToOneDecimalPlace(value)
+	fmt.Printf("%.1f\n", roundedValue) // 输出 3.1
+}
+func TestCalc5(t *testing.T) {
+	var a = 1596
+	float := strconv.FormatFloat(float64(a/10.0), 'f', 1, 64)
+	fmt.Printf(float)
+}
+func TestMath(t *testing.T) {
+	i := int(float64(256) * (85 / 100.0) * 10)
+	fmt.Println(i)
+}