#include <stdio.h>

int main( )
{
	int a = 2, b = 3, c = 4;
	int *p = NULL;

	p = &a;
	printf( "pointing to %d\n", *p );
	p = &b;
	printf( "pointing to %d\n", *p );
	p = &c;
	printf( "pointing to %d\n", *p );
}