/*
 * simple examples of conditional execution, including scanf error check
 */
#include <stdio.h>

int main(void) {

	int a;
	printf("enter an integer\n");

    /* read variable with simple check for error */
	if (scanf("%d", &a) == 1) {
		printf("a = %d\n", a);
	} else {
		printf("not an integer\n");
	}

    /* "switch" to select from among cases */
	switch(a) {
		case 0:  printf("zero\n"); break;
		case 1:  printf("one\n"); break;
		case 2: 
		case 3:  printf("two or three\n"); break;
		default:  printf("other\n"); break;
	}
	return 0;
}