#include<stdio.h>
//pass the simple pointer to the function
void swapnum(int* i, int* j)
{
int tmp = *i;
*i = *j;
*j = temp;
}
int main()
{
int a = 10;
int b = 20;
swap(&a,&b);
printf("A is %d and B is %d\n", a , b);
return 0;
}