Go語言 之指針作為函數參數

package main

import (
    "fmt"
)

func swap01(a, b int) {
    a, b = b, a
    fmt.Printf("swap01 a = %d, b = %d\n", a, b)
}

func swap02(x, y *int) {
    *x, *y = *y, *x
}

func main() {
    a := 10
    b := 20

    //swap01(a, b)     //值傳遞（傳值）
    swap02(&a, &b) //地址傳遞（傳引用）
    fmt.Printf("a = %d, b = %d\n", a, b)
}