Go每日一题

今日（2022-11-30）的题目如下

f1()、f2()、f3() 函数分别返回什么？

package main

import (
	"fmt"
)

func f1() (r int) {
	defer func() {
		r++
	}()
	return 0
}

func f2() (r int) {
	t := 5
	defer func() {
		t = t + 5
	}()
	return t
}

func f3() (r int) {
	defer func(r int) {
		r = r + 5
	}(r)
	return 1
}

func main() {

	fmt.Println(f1())
	fmt.Println(f2())
	fmt.Println(f3())
}