pr0311.cpp

practice c++, it is from the book http://www.amazon.com/Schaums-Outline-Programming-John-Hubbard

//  Programming with C++, Second Edition, by John R. Hubbard
//  Copyright McGraw-Hill, 2000
//  Problem 3.11 on page 51
//  Playing "Rock, Scissors, Paper"

#include <iostream>
using namespace std;

enum Winner {PLAYER1, PLAYER2, TIE}; 

int main()
{ int choice1, choice2;
  cout << "Choose rock (0), paper (1), or scissors (2):" << endl;
  cout << "Player #1: ";
  cin >> choice1;
  cout << "Player #2: ";
  cin >> choice2;
  int n = (choice1 - choice2 + 3) % 3;
  Winner winner = ( n==0 ? TIE : (n==1?PLAYER1:PLAYER2) );
  if (winner == TIE) cout << "\tYou tied.\n";
  else if (winner == PLAYER1) cout << "\tPlayer #1 wins." << endl;
  else cout << "\tPlayer #2 wins." << endl;
}