include

using namespace std;

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

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

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

sum = num1 + num2;

cout << "The sum of " << num1 << " and " << num2 << " is " << sum;

return 0;

}

Explanation: 1. The program starts with the inclusion of the iostream library, which provides input/output functionalities for C++ programs.

1. The "using namespace std;" statement allows us to use the standard library functions and objects without specifying the std namespace.

2. The main() function is the entry point of the program. It is where the program starts its execution.

3. Inside the main() function, we declare three variables: num1, num2, and sum. These variables will hold the user input and the result of the addition.

4. The "cout" object is used to output data to the console. In this case, we use it to prompt the user to enter the first number.

5. The "cin" object is used to read input from the user. In this case, we use it to store the user's input in the num1 variable.

6. We repeat steps 5 and 6 to prompt the user for the second number and store it in the num2 variable.

7. The sum of num1 and num2 is calculated using the "+" operator and stored in the sum variable.

8. We use the "cout" object again to display the result to the user. The values of num1, num2, and sum are concatenated using the "<<" operator.

9. Finally, we return 0 to indicate that the program execution was successful.