Refactor the code

Have a look at this piece of code. It has a myriad of issues that reduce its readability. Refactor the code to make it more readable.

#include <iostream>

int main() {
    int l = 5;
    int w = 10;
    int a = l * w;
    std::cout << "Area of rectangle: " << a << std::endl;

    int r = 7;
    double c = 2 * 3.14159 * r;
    std::cout << "Circumference of circle: " << c << std::endl;

    return 0;
}

Hint

You can consider the following:

• Use meaningful variable names.
• Use comments to explain the purpose of the code.
• Use constants to remove magic numbers.
• Use functions to encapsulate code.

Answer

Here you can see an example of how the code could be refactored:

#include <iostream>

// Constants
const double PI = 3.14159;

int main() {
    // Rectangle dimensions
    int length = 5, width = 10;
    int area = length * width;
    std::cout << "Area of rectangle: " << area << std::endl;

    // Circle radius
    int radius = 7;
    double circumference = 2 * PI * radius;
    std::cout << "Circumference of circle: " << circumference << std::endl;

    return 0;
}