Write a program to compute the area of a triangle and a circle by overloading the area() function.

 Here's an example program that overloads the area() function to calculate the area of a triangle and a circle:

#include <iostream>
using namespace std;

// Function to calculate area of triangle
float area(float base, float height) {
    return 0.5 * base * height;
}

// Function to calculate area of circle
float area(float radius) {
    return 3.14 * radius * radius;
}
int main() {
    float base, height, radius;

    // Read input for triangle
    cout << "Enter base and height of the triangle: ";
    cin >> base >> height;

    // Calculate and display area of triangle
    float tri_area = area(base, height);

    cout << "Area of triangle: " << tri_area << endl;

    // Read input for circle
    cout << "Enter radius of the circle: ";
    cin >> radius;

    // Calculate and display area of circle
    float circle_area = area(radius);
    cout << "Area of circle: " << circle_area << endl;
    return 0;
}

Explanation:

• We define two functions with the same name area(), but with different arguments. This is called function overloading.
• The first area() function calculates the area of a triangle using the formula 0.5 * base * height.
• The second area() function calculates the area of a circle using the formula 3.14 * radius * radius.
• In the main() function, we first read input for the triangle by taking values for the base and height. We then call the area() function with these values to calculate the area of the triangle and display it on the screen.
• Next, we read input for the circle by taking the value of its radius. We then call the area() function with the radius value to calculate the area of the circle and display it on the screen.

Output:

Enter base and height of the triangle: 4 5
Area of triangle: 10
Enter radius of the circle: 2
Area of circle: 12.56

The program first calculates the area of the triangle with base 4 and height 5, which is 10. Then it calculates the area of the circle with radius 2, which is 12.56.