Answer to Question #128506 in C++ for Ali Rizwan

Question

Write a function called circarea() that finds the area of a circle. It should take an argument of type float and return an argument of the same type. Write a main() function that gets a radius value from the user, calls circarea(), and displays the result.

Answer 1

#include <iostream>

const float PI = 3.1415926;

float circarea(float r)
{
	return PI * r * r;
}

int main()
{
	float radius;
    std::cout << "Enter circle radius : ";
	std::cin >> radius;
	std::cout << "Circle area = " << circarea(radius) << "\n";
}