6_54.cpp

《c++程序设计技能百练》源代码,内有99个实例。

#include<iostream.h>
const double pi=3.1415926;

class Column
{
public:
	void SetColumn();
	double getvolume();
	double getsurface();
	void disp();
private:
	double radius;
	double height;
};

void Column::SetColumn()
{
	double r,h;
	cout<<"Input the radius and height of a column!";
	cout<<endl;
	cout<<"radius=";
	cin>>r;
	cout<<"height=";
	cin>>h;
	radius=r;
	height=h;
}
inline double Column::getvolume()
{
	return pi*radius*radius*height;
}
inline double Column::getsurface()
{
	return 2*pi*radius*(height+radius);
}
void Column::disp()
{
	cout<<"The volume of the column is "<<Column::getvolume();
	cout<<endl;
	cout<<"The surface of the column is "<<Column::getsurface();
	cout<<endl;
}

void main()
{
	Column mycolumn;
	mycolumn.SetColumn();
	mycolumn.getvolume();
	mycolumn.getsurface();
	mycolumn.disp();
}