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A full M&M jug.
The M&M jug from a more dramatic angle.

M&M's are small candy coated milk chocolate delights that come in a rainbow of colors and several variations. The XINU Lab maintains a supply of these colorful treats so that members of the lab can make it through the hard days and long nights of XINU development.

Reference shot for 3-45 oz bags of M&Ms in the jug.
Reference shot for 4.5-56 oz bags of M&Ms in the jug.

Number of M&Ms in the jug

After filling the M&M jug about halfway full, I wondered about how many M&Ms it held. A little investigation and I developed this program to provide the number of M&Ms given <math>n</math> ounces.


Perhaps someone should port this to work with the XINU code base.

#include <stdio.h>
#include <stdlib.h>

void usage(char *prog);

int main(int argc, char **argv)
    int oz, mm;

    if (argc != 2)

    oz = atoi(argv[1]);

    /* empirical evidence shows 500 M&Ms per pound */
    mm = 500 * (oz / 16);

    /* catch the remaining oz */
    mm += (31 * (oz % 16));

    /* technically it is 31.25 M&Ms per ounce */
    /* so add 1 M&M for every 4 ounces */
    mm += ((oz % 16) / 4);

    printf("There are approximately %d M&Ms in %d ounces.\n", mm, oz);

    return 0;

void usage(char *prog)
    fprintf(stderr, "Usage: %s oz\n", prog);
    fprintf(stderr, "  Calculate the number of M&Ms in oz ounces.\n");