关于golang的defer的练习

package main

import (
    "fmt"
)

func main() {
    // a()
    fmt.Println(c())
    // b()
    // fmt.Println(d())
}
func c() (i int) {
    defer func() { i++ }()
    defer fmt.Println("this:", i)
    return 1
}
func a() {
    i := 0
    defer fmt.Println(i)
    i = i + 1
}

func b() {
    var whatever [5]struct{}
    for i := range whatever {
        // defer func() { fmt.Println(i) }()
        defer func(n int) { fmt.Println(n) }(i)
    }
}

func d() (i int) {
    defer fmt.Println("sdad")
    return 1
}

this: 0
2

 0

4
3
2
1
0

sdad
1

package main

import (
    "fmt"
)

func main() {
    test()
}

func test() (int, error) {
    defer fmt.Println("defer")
    return fmt.Println("return")
}

return
defer