// Listing 4.2 - Demonstrates 

 // prefix and postfix and increment and

 // decrement operators

 #include <iostream>

 

 int main()

 {

     int myAge = 39;      // initialize two integers

     int yourAge = 39;

     std::cout << "I am:\t" << myAge << "\tyears old.\n";

     std::cout << "You are:\t" << yourAge << "\tyears old\n";

     myAge++;         // postfix increment

     ++yourAge;       // prefix increment

     std::cout << "One year passes...\n";

     std::cout << "I am:\t" << myAge << "\tyears old.\n";

     std::cout << "You are:\t" << yourAge << "\tyears old\n";

     std::cout << "Another year passes\n";

     std::cout << "I am:\t" << myAge++ << "\tyears old.\n";

     std::cout << "You are:\t" << ++yourAge << "\tyears old\n";

     std::cout << "Let's print it again.\n";

     std::cout << "I am:\t" << myAge << "\tyears old.\n";

     std::cout << "You are:\t" << yourAge << "\tyears old\n";

     return 0;

 }