areas.cpp

这是我们老师留的作业

#include<iostream.h>
const double pi=3.1416;
float getR()
{ 
	float r;
    cout<<"plaese enter the rand"<<endl; 
	cin>>r;
    return r;
}
void getinform(float &w,float &h)
{
	cout<<"please enter the weight and height"<<endl;
	cin>>w>>h;
}
double circle()
{   float r;
	r=getR();
	return pi*r*r;
}
double squre()
{
	 float c,d;
	getinform(c,d);
	return c*d;
}
void main()
{
	
    cout<<"the circle's areas is"<<circle()<<endl; 
    cout<<"the squre's areas is"<<squre()<<endl;

}