package main

import "fmt"

func main() {
	// ptr := new(int)

	a := 3
	b := 4
	test(&a, &b)
}

func test(x1 *int, x2 *int) {
	// fmt.Println(*x1 * *x2)
	*x1, *x2 = *x2, *x1
	fmt.Println(*x1, *x2)
}