/* times.c, output some products */
#include <stdio.h>

unsigned int times( unsigned int ier, unsigned int cand );

unsigned int main() { /* output multiplication table */
    unsigned int i, j;  /* loop counters */
    for (i = 0; i < 100; i = i + 10) { /* for each row */
	for (j = 0; j < 100; j = j + 10) { /* for each column */
	    printf( "%5d", times( i, j ) );
	}
	putchar( '\n' );
    }
    return 0;
}

unsigned int times( unsigned int ier, unsigned int cand ) {
    /* return product of (multipl)ier and (multipli)cand */
    unsigned int prod = 0; /* accumulator for partial products */
    while (ier > 0) {
	if (ier & 1) { /* add partial product */
	    prod = prod + cand;
	}
	ier = ier >> 1;
	cand = cand << 1;
    }
    return prod;
}