prepostfix.cpp

来自「《24学时精通c++》的光盘内容」· C++ 代码 · 共 25 行

 // 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;
 }