Here is an example of a simple function in C++:

#include <iostream>
using namespace std;

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

int main() {
    int x = 5, y = 7;
    cout << "The sum of " << x << " and " << y << " is " << add(x, y) << endl;
    return 0;
}
In this example, the function is called "add" and takes two integer arguments, "a" and "b". The function uses the return statement to return the sum of the two arguments.

In the main function, we declare two integer variables, "x" and "y", and initialize them with the values 5 and 7. We then call the add function, passing in the variables x and y as arguments, and store the returned value in the variable "sum". Finally, we use the cout statement to print out a sentence that includes the values of x, y, and sum.

You can also pass in variables by reference instead of by value.

Copy code
void swap(int& a, int& b) {
    int temp = a;
    a = b;
    b = temp;
}
Function can also return multiple values using struct or tuple

Copy code
struct Result {
    int x;
    int y;
};

Result add_and_subtract(int a, int b) {
    Result res;
    res.x = a + b;
    res.y = a - b;
    return res;
}
This is just a basic example of how to write a function in C++, and there are many other ways to define and use functions in this language.


In this example, the function is called "add" and takes two integer arguments, "a" and "b". The function uses the return statement to return the sum of the two arguments.

In the main function, we declare two integer variables, "x" and "y", and initialize them with the values 5 and 7. We then call the add function, passing in the variables x and y as arguments, and store the returned value in the variable "sum". Finally, we use the cout statement to print out a sentence that includes the values of x, y, and sum.

You can also pass in variables by reference instead of by value.
void swap(int& a, int& b) {
    int temp = a;
    a = b;
    b = temp;
}
Function can also return multiple values using struct or tuple
struct Result {
    int x;
    int y;
};

Result add_and_subtract(int a, int b) {
    Result res;
    res.x = a + b;
    res.y = a - b;
    return res;
}
This is just a basic example of how to write a function in C++, and there are many other ways to define and use functions in this language.







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