#include <stdio.h>
#include <stdint.h>


int main(void) {
    FILE *f1 = fopen("test1", "w");
    FILE *f2 = fopen("test2", "w"); 

    fprintf(f1, "%d", 255);  //255 3 bytes '2''5''5'
    fputc(255,f2);     // 11111111 0xff      

    fclose(f1);
    fclose(f2);
    

    return 0;
}