Add two Numbers in C++

You can add two numbers in C++ using the + operator. Here’s a simple C++ program that takes two numbers as input from the user and then adds them together:

#include <iostream>

int main() {
    double num1, num2, sum;

    // Input the first number
    std::cout << "Enter the first number: ";
    std::cin >> num1;

    // Input the second number
    std::cout << "Enter the second number: ";
    std::cin >> num2;

    // Add the two numbers
    sum = num1 + num2;

    // Display the result
    std::cout << "The sum of " << num1 << " and " << num2 << " is: " << sum << std::endl;

    return 0;
}

In this program:

1. We include the <iostream> header to use input and output streams.
2. We declare three variables: num1, num2, and sum to store the two input numbers and their sum.
3. We use std::cin to get input from the user for both num1 and num2.
4. We add num1 and num2 together and store the result in the sum variable.
5. Finally, we use std::cout to display the result to the user.

Compile and run this program, and it will add the two numbers you provide as input and display the sum.