Go 引用传递

package main



import "fmt"



func main() {

   /* local variable definition */

   var a int = 100

   var b int = 200



   fmt.Printf("Before swap, value of a : %d\n", a )

   fmt.Printf("Before swap, value of b : %d\n", b )



   /* calling a function to swap the values */

   swap(a, b)



   fmt.Printf("After swap, value of a : %d\n", a )

   fmt.Printf("After swap, value of b : %d\n", b )

}

func swap(x, y int) int {

   var temp int



   temp = x /* save the value of x */

   x = y    /* put y into x */

   y = temp /* put temp into y */



   return temp;

}