#include <stdio.h>
void swap(int*a, int*b);

main()
{
int a,b;
printf("a=");
scanf("%d",&a);
printf("b=");
scanf("%d",&b);
swap(&a,&b);
printf("a=%d\n",a);
printf("b=%d\n",b);

return 0;
}

void swap(int* a, int* b)
{
int tmp;
tmp = *a;
*a = *b;
*b = tmp;
}