simple c++ program

Sure! Here is a simple C++ program with explanations for each step:

#include <iostream>

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

  // Prompt the user to enter two numbers
  std::cout << "Enter the first number: ";
  std::cin >> num1;

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

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

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

  return 0;
}

Let's break down the program step by step:

Including the necessary header file

#include <iostream>

The #include <iostream> directive tells the compiler to include the input/output stream library, which provides functions for reading input from the user and printing output to the console.

Defining the main function

int main() {
  // Code goes here
  return 0;
}

The int main() function is the entry point of every C++ program. It is where the execution of the program begins. In this program, the main function defines the code that will be executed.

Declaring variables

int num1, num2, sum;

Here, we declare three integer variables: num1, num2, and sum. These variables will be used to store the numbers entered by the user and the sum of those numbers.

Prompting the user for input

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

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

The std::cout statement is used to print the prompt message asking the user to enter the first and second numbers. The std::cin statements are used to read the user's input and store it in the variables num1 and num2, respectively.

Adding the numbers

sum = num1 + num2;

This line of code calculates the sum of num1 and num2 and assigns the result to the variable sum.

Displaying the result

std::cout << "The sum of " << num1 << " and " << num2 << " is " << sum << std::endl;

This line of code uses std::cout to display the sum of num1 and num2 on the console. The << operator is used to concatenate the string literals and the values of the variables.

Returning from the main function

return 0;

The return 0; statement indicates that the program has executed successfully and is ready to exit. The value 0 is conventionally used to indicate successful execution.

I hope this explanation helps! Let me know if you have any further questions.