Functions Unpacked: A Guide to C++ Functions – Sample Code

  #include <iostream>
#include <string>

// Function prototype (declaration)
int add(int a, int b);
void greet(std::string name);

int main() {
    // Calling a function and storing the returned value
    int sum = add(10, 5);
    std::cout << "Sum of 10 and 5 is: " << sum << std::endl;

    // Calling a function that returns void
    greet("John");

    return 0;
}

// Function definition
int add(int a, int b) {
    return a + b;
}

void greet(std::string name) {
    std::cout << "Hello, " << name << "!" << std::endl;
}

This code block demonstrates a simple example of C++ functions. The program has two functions: add and greet. The add function takes two integer arguments and returns their sum, while the greet function takes a string argument and prints a greeting message.

The function prototypes are declared before the main function, and the function definitions are provided after the main function. The main function calls both functions and demonstrates how to handle the return values and pass arguments to functions.