Solution Source Code

Code Overview

1. Header Files and Namespace:

• <iostream> is included for input and output operations.
• <string> is included for potential future use (not used in this program).
• using namespace std; allows the use of standard functions without prefixing them with std::.

2. Enumeration (enOddOrEven)

• Defines two values:
  • Odd = 1 (for odd numbers).
  • Even = 2 (for even numbers).

3. User Input Function (ReadNumber)

• Prompts the user to enter a number (N).
• Reads and returns the number as an integer.

4. Odd/Even Check Function (CheckOddOrEven)

• Takes an integer as input.
• Returns:
  • enOddOrEven::Odd if the number is odd.
  • enOddOrEven::Even if the number is even.

5. Sum Even Numbers Using While Loop (SumEvenNumbersFrom1toN_UsingWhile)

• Uses a while loop to iterate from 1 to N.
• Checks if the current number is even, then adds it to the sum.

6. Sum Even Numbers Using Do-While Loop (SumEvenNumbersFrom1toN_UsingDoWhile)

• Uses a do-while loop to iterate from 1 to N.
• Ensures at least one iteration before checking the condition.
• Adds even numbers to the sum.

7. Sum Even Numbers Using For Loop (SumEvenNumbersFrom1toN_UsingFor)

• Uses a for loop to iterate from 1 to N.
• Checks if the number is even, then adds it to the sum.

8. Program Execution (main())

• Calls ReadNumber() to get user input.
• Calls SumEvenNumbersFrom1toN_UsingWhile(), SumEvenNumbersFrom1toN_UsingDoWhile(), and SumEvenNumbersFrom1toN_UsingFor() to compute and print the sum of even numbers.
• Returns 0 to indicate successful execution.

This structured explanation ensures clarity and ease of understanding.