C++ Program to Compute Area and Circumference of a Circle

#include <iostream>
#include <string>
using namespace std;
int main()
{
cout << "Circle radius (real number)?";
float radius;
cin >> radius;
cout << "Area of circle with radius " << radius;
<< "is" << (3.1415*radius*radius) << endl;
cout << "Circumference is " << 3.1415*2*radius;
<< endl;
return 0;
}