p416 12.1.cpp

来自「谭浩强 《C++ 程序设计》第三版的部分课后练习题源码」· C++ 代码 · 共 37 行

#include"Shape.h"
#include"Point.h"
#include"Pointdef.cpp"
#include"Circle.h"
#include"Circledef.cpp"
#include"Cylinder.h"
#include"Cylinderdef.cpp"



int main()
{
    Point p(23.4,56);
    Shape *s=&p;
    s->showname();
    s->display();
    cout<<"the area ="<<s->area()<<endl;
    cout<<"the volum ="<<s->volume()<<endl;
    
    Circle c(34,23,4);
    s=&c;
    s->showname();
    s->display();
    cout<<"the area ="<<s->area()<<endl;
    cout<<"the volum ="<<s->volume()<<endl;
    
    Cylinder cy(23,45,24,12);
    s=&cy;
    s->showname();
    s->display();
    cout<<"the area ="<<s->area()<<endl;
    cout<<"the volum ="<<s->volume()<<endl;
    
    system("pause");
    return 0;  
}