WARNING: BLOAT

SICKENING, SIRS, SICKENING
AN INT TAKES THE SAME AMOUNT OF MEMORY AS A LONG!!

YOU CAN TEST IT YOURSELF !!

WARNING:THIS WILL DISGUST YOU

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

int main()
{
    char c;
    int i;
    long l;

    printf( "A char is this big: %d\n", sizeof(c) );
    printf( "An int is this big: %d\n", sizeof(i) );
    printf( "A long is this big: %d\n", sizeof(l) );
}

>>13
In other words, ints are at least two bytes, longs are at least four bytes, and both can be longer than that depending on your implementation.