list0404.cpp

teach yourself C++ in 21 days 第五版

// Listing 4.4 - demonstrates if statement
// used with relational operators
#include <iostream>
int main()
{
   using std::cout; 
   using std::cin;

    int MetsScore, YankeesScore;
    cout << "Enter the score for the Mets: ";
   cin >> MetsScore;
 
   cout << "\nEnter the score for the Yankees: ";
   cin >> YankeesScore;
  
   cout << "\n";
  
   if (MetsScore > YankeesScore)
      cout << "Let's Go Mets!\n";
  
   if (MetsScore < YankeesScore)
   {
      cout << "Go Yankees!\n";
   }
  
   if (MetsScore == YankeesScore)
   {
      cout << "A tie? Naah, can't be.\n";
      cout << "Give me the real score for the Yanks: ";
      cin >> YankeesScore;
  
      if (MetsScore > YankeesScore)
         cout << "Knew it! Let's Go Mets!";

      if (YankeesScore > MetsScore)
         cout << "Knew it! Go Yanks!";
 
      if (YankeesScore == MetsScore)
         cout << "Wow, it really was a tie!";
   }
  
   cout << "\nThanks for telling me.\n";
   return 0;
}