// illustrates character arithmetic
// Mikhail Nesterenko
// 4/12/2013

#include <iostream>

using std::cout; using std::endl;

int main(void){

  // printing digitls from 0 to 9, treating digits as characters
  for(char digit='0';  digit <= '9'; ++digit)
    cout << digit << ' ';
  cout << endl;

  // printing letters from 'a' to 'z', using a character variable
  // as a loop variable
  for(char letter='a'; letter <= 'z'; ++letter)
    cout << letter << ' ';
  cout << endl;

  // printing letters from 'A' to 'Z' 
  // adding integer to character
  for(int i=0; i <= 'Z' - 'A'; ++i){
    char Letter = 'A' + i;
    cout << Letter << ' ';
  }
  cout << endl;
}