go string to int 字符串与整数型的互换方式

package main
 
import (
	"fmt"
	"strconv"
)
 
func main() {
	// 把字符串转换为数字
	str := "10000"
	ret1, err := strconv.ParseInt(str, 10, 64)
	if err != nil {
		fmt.Printf("paresint failed, err:%v", err)
		return
	}
	fmt.Printf("%#v %Tn", ret1, ret1)
	// 把数字转换为字符串
	i := int32(97)
	ret2 := fmt.Sprintf("%d", i)
	fmt.Printf("%#v", ret2)
}

func DoSomething(v interface{}) {
   // ...
}

// 假设 v 为 string或int64或float64
func DoSomething(v interface{}) {
	string1 := v.(string)
	int1 := v.(int64)
	float1 := v.(float64)
}

func interface2Type(i interface{}) {
	switch i.(type) {
	case string:
		fmt.Println("string", i.(string))
		break
	case int:
		fmt.Println("int", i.(int))
		break
	case float64:
		fmt.Println("float64", i.(float64))
		break
	}
}
 
func main() {
	interface2Type("niuben")
	interface2Type(1122)
	interface2Type(11.22)
}