#include <stdio.h>
void Switch(int []);

main(){
int a,b;
int arr[] = {5,6};

printf("Before%d %d\n",arr[0],arr[1]);
Switch(arr);
printf("After%d %d\n",arr[0],arr[1]);
}

void Switch(int *arrp){
int i;
 i = arrp[0];
 arrp[0]=arrp[1];
 arrp[1]=i;
}