Question

write a simple c++ program to compute the area of a circle

Answer 1

#include <iostream>

double calculateCircleArea(double radius, double pi = 3.14) {
    return radius * radius * pi;
}

int main() {
    std::cout << "Enter radius: ";
    double radius = 0;
    std::cin >> radius;
    std::cout << "Area: " << calculateCircleArea(radius);
    return 0;
}