/*
 * Program to write integers to binary file.
 *
 * (To look at the file, you can use "od -t x1 filename" to print it one
 * byte at a time in hexadecimal.)
 */
#include <stdio.h>
#include <stdlib.h>

/* main program */
int main(int argc, char *argv[]) {
    if (argc != 2) {
        printf("usage:  %s outfile\n", argv[0]);
        return 1;
    }
    FILE * outfile = fopen(argv[1], "wb");
    if (outfile == NULL) {
        printf("cannot open output file %s\n", argv[1]);
        return 1;
    }

    for (int i = 1; i <= 10; ++i) {
	    fwrite(&i, sizeof(i), 1, outfile);
    }
    fclose(outfile);
    return 0;
}