Default values in member functions : member method « Class « C++ Tutorial

1. C++ Tutorial
2. Class
3. member method

#include <iostream>
 
 
 class Rectangle
 {
 public:
 
     Rectangle(int width, int height);
     ~Rectangle(){}
     void display(int aWidth, int aHeight, 
     bool UseCurrentVals = false) const;
 private:
     int itsWidth;
     int itsHeight;
 };
 
 
 Rectangle::Rectangle(int width, int height): itsWidth(width), itsHeight(height
) {}                   
 
 void Rectangle::display(int width, int height, bool UseCurrentValue) const
 {
     int printWidth;
     int printHeight;
 
     if (UseCurrentValue == true)
     {
         printWidth = itsWidth;       
         printHeight = itsHeight;
     }
     else
     {
         printWidth = width;         
         printHeight = height;
     }
 
     for (int i = 0; i<printHeight; i++)
     {
         for (int j = 0; j< printWidth; j++)
         {
             std::cout << "*";
         }
         std::cout << "\n";
     }
 }
 
 int main()
 {
     Rectangle theRect(30,5);
     std::cout << "display(0,0,true)...\n";
     theRect.display(0,0,true);
     std::cout <<"display(40,2)...\n";
     theRect.display(40,2);
     return 0;
 }

display(0,0,true)...
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display(40,2)...
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