C++ Function with Multiple Parameters

In C++, functions can have multiple parameters, allowing you to pass multiple pieces of data to a function when it is called. Each parameter is specified with a type and a name, and the values passed during the function call are assigned to these parameters.

Syntax

The syntax of a function that accepts multiple parameters is give below:

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return_type function_name(parameter_type1 parameter_name1, parameter_type2 parameter_name2, ... ) {
    // Function body
}

Explanation: return_type: Specifies the type of value the function returns. Use void if the function does not return anything.
function_name: The name of the function, following C++ naming conventions.
parameter_type1 parameter_name1, parameter_type2 parameter_name2: Specify the type and name of each parameter. Parameters are separated by commas.

Examples for Function with Multiple Parameters

Example 1: Calculating the Product of Two Numbers

In this example, we will define a function multiply with two integer parameters.

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#include <iostream>
using namespace std;

int multiply(int a, int b) {
    return a * b;
}

int main() {
    int result = multiply(10, 20);
    cout << "The product is: " << result << endl;
    return 0;
}
The product is: 200

Explanation: The multiply function takes two parameters, a and b, and returns their product. The function is called in the main function with arguments 10 and 20.

Example 2: Displaying a Custom Message with a Count

In this example, we will define a function displayMessage with a string parameter and an integer parameter.

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#include <iostream>
using namespace std;

void displayMessage(string message, int count) {
    for (int i = 0; i < count; i++) {
        cout << message << endl;
    }
}

int main() {
    displayMessage("Welcome to C++ programming!", 3);
    return 0;
}

Welcome to C++ programming!
Welcome to C++ programming!
Welcome to C++ programming!

Explanation: The displayMessage function takes two parameters: a string message and an int count. It prints the message to the console the number of times specified by count.