C++ Tutorial/Function/const methods — различия между версиями
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Текущая версия на 10:29, 25 мая 2010
Using pointers with const methods
#include <iostream>
class Rectangle
{
public:
Rectangle();
~Rectangle();
void SetLength(int length) { itsLength = length; }
int GetLength() const { return itsLength; }
void SetWidth(int width) { itsWidth = width; }
int GetWidth() const { return itsWidth; }
private:
int itsLength;
int itsWidth;
};
Rectangle::Rectangle(): itsWidth(5), itsLength(10) {}
Rectangle::~Rectangle()
{}
int main()
{
Rectangle* pRect = new Rectangle;
const Rectangle * pConstRect = new Rectangle;
Rectangle * const pConstPtr = new Rectangle;
std::cout << "pRect width: " << pRect->GetWidth() << " feet\n";
std::cout << "pConstRect width: " << pConstRect->GetWidth() << " feet\n";
std::cout << "pConstPtr width: " << pConstPtr->GetWidth() << " feet\n";
pRect->SetWidth(10);
pConstPtr->SetWidth(10);
std::cout << "pRect width: " << pRect->GetWidth() << " feet\n";
std::cout << "pConstRect width: " << pConstRect->GetWidth() << " feet\n";
std::cout << "pConstPtr width: " << pConstPtr->GetWidth() << " feet\n";
return 0;
}pRect width: 5 feet pConstRect width: 5 feet pConstPtr width: 5 feet pRect width: 10 feet pConstRect width: 5 feet pConstPtr width: 10 feet
