prog15.cpp

来自「C++语言程序设计题典」· C++ 代码 · 共 31 行

#include <iostream.h>
class Box
{
	float a;
	float volume;
	float area;
public:
	Box() {}
	Box(float r) { a=r; }
	void seta(float r) { a=r; }
    void getvolume() { volume=a*a*a; }
	void getarea() { area=6*a*a; }
	void disp()
	{
		cout << "体积:" << volume << ",表面积:" << area << endl;
	}
};
void main()
{
	Box obj1(4.5),obj2;
	obj2.seta(6.4);
	obj1.getvolume();
	obj1.getarea();
	cout << "obj1=>";
	obj1.disp();
	obj2.getvolume();
	obj2.getarea();
	cout << "obj2=>";
	obj2.disp();
}