c++继承经典例子.doc

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1、#includeclassBase{private:       intb_number;public:       Base(){}       Base(inti):b_number(i){}       intget_number(){returnb_number;}       voidprint(){cout<

2、c://constructor,initializerusedtoinitializethebasepartofaDerivedobject.       Derived(inti,intj):Base(i),d_number(j){};              //anewmemberfunctionthatoverridestheprint()functioninBase       voidprint()       {               cout<

3、                     //accessnumberthroughget_number()               cout<

4、         //print()inDerived       cout<<"basepartofbis";       b.Base::print();               //print()inBase       return0;}没有虚析构函数，继承类没有析构//Example:non-virtualdestructorsfordynamicallyallocatedobjects.#include#includeclassThing{pub

5、lic:virtualvoidwhat_Am_I(){cout<<"IamaThing.";}~Thing(){cout<<"Thingdestructor"<

6、l*x=newAnimal;  Thing*array[2];  array[0]=t;                               //basepointer  array[1]=x;                  for(inti=0;i<2;i++)array->what_Am_I();  deletearray[0];  deletearray[1];  return;}纯虚函数，多态#include#includeclassPoint{

7、private:       doublex;       doubley;public:       Point(doublei,doublej):x(i),y(j){}       voidprint()const       {cout<<"("<

8、Point&location(){returncenter;}                 //returnanlvalue  voidmove(Pointp){center=p;draw();}       virtualvoiddraw()=0;//drawthefigure       virtualvoidrotate(double)=0;//rotatethefigurebyanangle