Cpp Function Definition

C++ function definition

Created By: chatGPT

Function definition in C++ consists of several important components, including the return type, function name, parameter list, and the function body. Below is a detailed explanation of these components and a sample code to illustrate them.

// Example of function definition in C++
float calculateArea(float radius) {
    const float pi = 3.14159;
    return pi * radius * radius;
}

In this example, the function calculateArea is defined to calculate the area of a circle given its radius. The return type is float, indicating that the function will return a floating-point number. The function accepts one parameter, radius, which is also of type float.

// Calling the function
#include <iostream>

int main() {
    float radius = 5.0;
    float area = calculateArea(radius);
    std::cout << "Area of the circle: " << area << std::endl;
    return 0;
}

When the function is called in the main function, it passes the radius as an argument. The return value is then stored in the variable area, which is printed to the console. This shows how to define and use a function effectively in C++.


// Full example code
#include <iostream>

float calculateArea(float radius) {
    const float pi = 3.14159;
    return pi * radius * radius;
}

int main() {
    float radius = 5.0;
    float area = calculateArea(radius);
    std::cout << "Area of the circle: " << area << std::endl;
    return 0;
}