下面程序分别输出什么?

func f1() {    for i := 0; i < 5; i++ {	defer fmt.Println(i)    }}func f2() {    for i := 0; i < 5; i++ {	defer func() {	    fmt.Println(i)	}()    }}func f3() {    for i := 0; i < 5; i++ {	defer func(n int) {	    fmt.Println(n)	}(i)    }}func f4() int {    t := 5    defer func() {	t++    }()    return t}func f5() (r int) {    defer func() {	r++    }()    return 0}func f6() (r int) {    t := 5    defer func() {	t = t + 5    }()    return t}func f7() (r int) {    defer func(r int) {	r = r + 5    }(r)    return 1}复制代码

题目的详细讲解，欢迎关注 Go后端干货

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