´ÙÇü¼º (Polymorphism)

´ÙÇü¼º (Polymorphism)

• ´ÙÇü¼º
  • The ability of two or more classes to respond to the same message, each in its own way.
    • move(int x, int y); for Polygon and Circle
    • print( ); for TextFile, GraphicFile and WordProcessorFile
  • Objects of a variety of different, but similar, classes can recognize some of the same messages and respond in similar, appropriate ways.
• ¸Þ¼¼Áö¿Í ¸Þ¼Òµå °£ÀÇ ±¸º°
  • Different methods could make sense for a message, but the sender simply send the message without being concerned with the class of the receiver.
• C++¿¡¼­ÀÇ Overloading
  • ÇÔ¼ö Áߺ¹¼º (Function Overloading)
  • ¿¬»êÀÚ Áߺ¹¼º (Operator Overloading)

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• Usage
  • Better structured & readable pgms
  • Debugging, Garbage Collection, Simulation, etc.
• Example in C++
  • Class debuggable { public: virtual void dump ( ) = 0; };
  • Class X : public debuggable { int i, j, k; public: X (int ii = 0; int jj = 0, int kk = 0) { i = ii; j = jj; k = kk; } void dump ( ) { cout << "i = " << i << "j= " << j ....