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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.
* &a indicates pointer to a ie. address of variable a and
* &b indicates pointer to b ie. address of variable b.
*/
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 *int, y *int) {
var temp int
temp = *x /* save the value at address x */
*x = *y /* put y into x */
*y = temp /* put temp into y */
}
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