size_t.c

#include <stdio.h>
#include <unistd.h>

int returnsnegative() {
    return -5;
}

ssize_t my_write(int fd, const void *buf, size_t count) {
    /* This functions has the same function prototype as write() */
    /* For more information: https://linux.die.net/man/2/write */
    printf("We have a count of %zu and will write that many characters\n", count
);
    return 0; /* Return is irrelevant */
}

int main() {
    /* Simulation of the given code */
    int length = returnsnegative(); /* This is "the bug", where apparently
                                     * negative numbers appear
                                     */
    my_write(0, "string", length);
    return 0;
}