// day_mon2.c -- letting the compiler count the elements
#include <stdio.h>
#define MONTHS 12

int main(void)
{
	const int days[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
	int index;
	
	for (index = 0; index < sizeof days / sizeof days[0]; index++)
		printf("Month %d has %2d days.\n", index + 1, days[index]);
	return 0;
}