/* gcc take-mem.c -o take-mem */
#include <stdlib.h>

int main (int argc, char **argv)
{
    char *buffer;
    size_t i, size;

    if (argc < 2)
        return 1;

    size = atoi(argv[1]);

    buffer = calloc (size * 1024 * 1024, 1);

    for (i = 1; i < size * 1024 * 1024; i++) {
        buffer[i] = buffer[i - 1] + 1;
    }

    pause ();

    return 0;
}