proj12_02.cpp

《C++程序设计教程》—源代码 面向对象的软件工程 VC上机指导 面向对象程序设计教案 友元函数入门教程 课件若干

#include <iostream.h>
#include "myarea.h"

void main()
{
	double width,length;
	width = 10.0;
	length = 15.0;
	cout <<"area of rectangle is " <<rect(width,length) <<endl;
	double radius;
	radius = 25;
	cout <<"area of circle is " <<circle(radius) <<endl;
}