(Circle Area) Write a C++ program that prompts the user for the radius of a circle, then calls inline function circleArea to calculate the area of that circle.

Question

What will be an ideal response?

Answer 1

// Use inline function to calculate circle area.
#include
using namespace std;

double pi = 3.14159; // global variable

// circleArea is inline function that returns area of circle
inline double circleArea( double r )
{
return pi * r * r; // return area
} // end function circleArea

int main()
{
double radius; // user entered radius
// prompt for radius
cout << "Enter the radius of the circle: ";
cin >> radius;

// calculate and display area of circle
cout << "The area of the circle is " << circleArea( radius ) << endl;
} // end main