Example: How to Find Area of a Circle with Diameter in C++ using Function Overloading

// How to Find Area of a Circle with Diameter in C++ using Function Overloading
#include <bits/stdc++.h>
using namespace std;

// This function will calculate the area of the circle
// function with int data type parameter
void CalculateArea(int x) {
    float d = 0, c = 0, a = 0;

    // It will calculate the diameter, circumference, and area of the circle
    d = (2 * x);
    c = (2 * 3.14 * x);
    a = 3.14 * (x * x);

    // It will produce the final output
    cout << "\n";
    cout << "Diameter      :: = " << d << " units\n";
    cout << "Circumference :: = " << c << " units\n";
    cout << "Area          :: = " << a << " sq. units\n";
}

// function with float data type parameter
void CalculateArea(float x) {
    float d = 0, c = 0, a = 0;
    // d is the diameter of the circle
    // c is the circumference of the circle
    // a is the area of the circle

    // It will calculate the diameter, circumference, and area of the circle
    d = (2 * x);
    c = (2 * 3.14 * x);
    a = 3.14 * (x * x);

    // It will produce the final output
    cout << "\n";
    cout << "Diameter      :: = " << d << " units\n";
    cout << "Circumference :: = " << c << " units\n";
    cout << "Area          :: = " << a << " sq. units\n";
}

// It's the driver function
int main() {
    int a = 7;
    float b = 10.4;

    // call function with int data type parameter
    CalculateArea(a);

    // call function with float data type parameter
    CalculateArea(b);

    return 0;
}