#include <stdio.h>
 
int main()
{
    unsigned char a = 0;
 
    FILE *ascii = fopen("ascii.txt", "wt");
    if(!ascii)
    {
        printf("somewhy failed\n");
        return 1;
    }
 
    fprintf(ascii, "%5s%5s%5s%5s\n", "dec", "oct", "hex", "char");
    do
    {
        fprintf(ascii, "%5d%5o%5x%5c\n", a, a, a, a);
    }
    while(++a != 0);
 
    printf("done");
    return 0;
}