#include <stdio.h>

int main(void)
{
	int ten = 10, two = 2;
	printf("Doing it right: ");
	printf("%d minus %d is %d\n", ten, 2, ten - two);
	printf("Doing it wrong: ");
	// forgot 2 arguments
	printf("%d minus %d is %d\n", ten);
	return 0;
}