C++程序设计：2.02

#include<iostream>
using namespace std;
int main()
{
	double l,r;
	double a,v;
	
	cout<<"Enter the radius and length of a cylinder:";
	cin>>r>>l;
	a=r*r*3.14159;
	v=a*l;
	cout<<"The area is"<<" "<<a<<endl;
	cout<<"The volume is"<<" "<<v<<endl;
	
	return 0;
}