#include <stdio.h>
void swap(int* pa, int *pb)
{
int c = *pa;
*pa = *pb;
*pb = c;
}
int main(void)
{
int a,b;
printf("a=");
scanf("%d", &a);
printf("b=");
scanf("%d", &b);
swap(&a,&b);
printf("a=%d\nb=%d\n", a, b);
return 0;
}