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

int main(int argc, char* argv[]) {
    unsigned char contents[] = { 'A', '\0', 'B', '\xff' };
    size_t num_chars = sizeof(contents) / sizeof(contents[0]);
    // This trick gives you the number of elements in an array on the STACK
    // (i.e., declared using square brackets).  It does not work for arrays on heap.
    
    FILE* fp = fopen("f.txt", "w");
    for(int i = 0; i < num_chars; i++) {
        fputc(contents[i], fp);
    }
    fclose(fp);

    return EXIT_SUCCESS;
}
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