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