// Comments begin with "//" and end at the line's end.
// Comments are not part of the program, but help human understanding.

// Oldham, Jeffrey D.
// 1999 Sep 07
// CS 1320
//
// Program to Add Two Integers

// input <- Prompted by the program, the user types two integers.
// output-> The integers' sum is printed.

// All C++ programs begin with the following two lines.
#include <iostream.h>

int main()
{
  // The important part of the program goes here.
  // First, we will ask the user for an integer.
  int first_integer;	// This line says that the name
			// "first_integer" is a variable that
			// represents an integer.
  cout << "Please enter an integer: ";
			// Print this on the screen.
  cin >> first_integer;	// Store the integer that the user types in 
			// the variable called "first_integer".

  // Now, we will ask for a second integer.
  int second_integer;
  cout << "Please enter an integer: ";
  cin >> second_integer;
  
  // Now we will print the sum of the integers.
  int sum = first_integer + second_integer;
			// This statement does two things:
			// 1) It declares an integer variable called "sum".
			// 2) It assigns the value of the sum of
			// first_integer and second_integer to "sum".
  cout << "The sum is " << sum << ".\n";
			// This prints the sum on the screen.
			// The "\n" means print a newline.  That is,
			// end the line and move the cursor to the
			// beginning of the next line.

  // The important part of the program ends here.
  // All C++ programs end with the following two lines.
  return 0;
}