#include <stdio.h>

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

int main()
{
	int a = 1;
	int b = 2;
	printf("a=%i, b=%i\n", a, b);
	swap(&a, &b);
	printf("a=%i, b=%i\n", a, b);

	return 0;
}