pointerSwap

package main
import "fmt"
func main () {
    var i, j int = 1, 2        //并行赋值
    fmt.Println(i, j)
    p := &i
    h := &j 
    swap(p, h)
    fmt.Println(i, j)
}
func swap(num1 *int, num2 *int) { 
     temp := *num1         //值交换，而不是指针交换
     *num1 = *num2
     *num2 = temp
}

1 2
2 1