#include <stdio.h>
 
int main (int argc, char const *argv[])
{
	int a = 1;
	int b = 2;
 
	printf("Start:  a:%i b:%in",a,b);
	a=a^b;
	printf("a=a^b:  a:%i b:%in",a,b);
	b=a^b;
	printf("b=a^b:  a:%i b:%in",a,b);
	a=a^b;
	printf("a=a^b3: a:%i b:%in",a,b);
	return 0;
}