// variabili char e differenza fra char e 'unsigned char'
// 

#include <stdio.h>

int main() {

  int i;
  char n=0;
  unsigned char un=0;
  int ind = 0;
  
  for (i=0; i<260; i++) {    
    n++;
    un++;
    ind++;
    printf("%3d: %3d %3u %3X\n", ind, n, un, un);  
  }
	
}