defaultparm.cpp

24学时攻克C++光盘源代码 深入浅出 方便实用

 // Listing 5.6 - demonstrates use
 // of default parameter values
 #include <iostream>
 
 int AreaCube(int length, int width = 25, int height = 1);
 
 int main()
 {
     int length = 100;
     int width = 50;
     int height = 2;
     int area;
 
     area = AreaCube(length, width, height);
     std::cout << "First time area equals " << area << "\n";
 
     area = AreaCube(length, width);
     std::cout << "Second time area equals " << area << "\n";
 
     area = AreaCube(length);
     std::cout << "Third time area equals " << area << "\n";
     return 0;
 }
 
 int AreaCube(int length, int width, int height)
 {
     return (length * width * height);
 }