cylinderdef.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 24 行

float Cylinder::area()const
{
      return 2*Circle::area()+2*3.1415*r*height;
      
}      
          
float Cylinder::volume()const
{
     return Circle::area()*height; 
      
}       
 
void Cylinder::showname()const
{
     cout<<"the information of the cylinder: ";
     
} 

void Cylinder::display()const
{
     Circle::display();
     cout<<"the height="<<height<<endl;
}