代碼

package main

import (

"fmt"

"strconv"

)

func main() {

str := "17"

int0, err0 := strconv.Atoi(str)

fmt.Printf("string到int,默認(rèn)值: %v\n", str)

if err0 != nil {

fmt.Printf("...報(bào)錯(cuò)了\n")

} else {

fmt.Printf("...轉(zhuǎn)化前：%T\n", str)

fmt.Printf("...轉(zhuǎn)化后：%T\n", int0)

}

fmt.Printf("string到int64,默認(rèn)值: %v\n", str)

int1, err1 := strconv.ParseInt(str, 10, 64)

if err1 != nil {

fmt.Printf("...報(bào)錯(cuò)了\n")

} else {

fmt.Printf("...轉(zhuǎn)化前：%T\n", str)

fmt.Printf("...轉(zhuǎn)化后：%T\n", int1)

}

int2 := 12

str2 := strconv.Itoa(int2)

fmt.Printf("int到string,默認(rèn)值: %v\n", int2)

fmt.Printf("...轉(zhuǎn)化前：%T\n", int2)

fmt.Printf("...轉(zhuǎn)化后：%T\n", str2)

var int3 int64

str3 := strconv.FormatInt(int3, 10)

fmt.Printf("int64到string,默認(rèn)值: %v\n", int3)

fmt.Printf("...轉(zhuǎn)化前：%T\n", int3)

fmt.Printf("...轉(zhuǎn)化后：%T\n", str3)

// 結(jié)果

//string到int,默認(rèn)值: 17

//...轉(zhuǎn)化前：string

//...轉(zhuǎn)化后：int

//string到int64,默認(rèn)值: 17

//...轉(zhuǎn)化前：string

//...轉(zhuǎn)化后：int64

//int到string,默認(rèn)值: 12

//...轉(zhuǎn)化前：int

//...轉(zhuǎn)化后：string

//int64到string,默認(rèn)值: 0

//...轉(zhuǎn)化前：int64

//...轉(zhuǎn)化后：string

}

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