/* shift2.c
 * For use in CSE351 Lec 5 on Integers
 *
 * Inputs:
 *   - direction:  shift left (0) or right (else)
 *   - number:     shift amount (number of bits)
 */
#include <stdio.h>
#include <stdlib.h>

int main(int argc,char *argv[]) {
	int dir,num,x = 100;

	// Want two arguments, but executable name is always argv[0]
	if (argc != 3) {
		printf("Usage:  ./shift2 <direction> <number>\n");
		printf("        direction: shift left (0) or right (else)\n");
		printf("        number:    shift amount (number of bits)\n");
		return 1;
	}

	// atoi() converts strings to integers
	dir = atoi(argv[1]);
	num = atoi(argv[2]);

	if(dir) // shift left
		printf("100 >> %d = %d\n",num,x>>num);
	else    // shift right
		printf("100 << %d = %d\n",num,x<<num);

	return 0;
}