Module3LabOption1LoopingThroughNumbers.cpp

//************************************************************************
// Author: Rolando Carreon
// Date: feb 28 2025
// Language: C++
// Assignment: Module 3 Lab - Option 1 - Looping Through Numbers
// Description: In this assignment, I will write a C++ program that
//              prompts the user to input two integers with the constraint
//              that firstNum must be less than secondNum.
//************************************************************************
#include <iostream>
using namespace std;

int main()
{
    // declare local variables
    int numOne;
    int numTwo = 0;
    int oddSum = 0;  // the sum of all odd numbers
    int evenSum = 0; // the sum of all even number
    
    // prompts user for the first number
    cout << "Enter the first number: ";
    cin  >> numOne;

    int savedNumOne = numOne; // copies original value of numOne

    // prompts user for a second number that must be larger else reprompts
    // displays data when if statment requirements met
    while ( numOne > numTwo )
    {
        cout << "Enter the second number: ";
        cin  >> numTwo;
        
    // if numOne is less than numTwo calculate and display data
        if ( numOne < numTwo )
        {
            cout << endl;
            
    // displays only odd numbers between input numOne & numTwo
            cout << "Odd numbers between " << numOne << " and "
                 << numTwo << ": ";
            for ( numOne = numOne; numOne <= numTwo; numOne++ )
            {
                if ( numOne % 2 != 0 )
                {
                    cout << numOne << "  "; // formatting
                    oddSum += numOne; // saves each odd num and adds it
                }
                
            }
            
            numOne = savedNumOne; // reset numOne to orginal input value

    // displays only even numbers between input numOne & numTwo
            cout << "\nEven numbers between " << numOne << " and "
                 << numTwo << ": ";
            for ( numOne = numOne; numOne <= numTwo; numOne++ )
            {
                if ( numOne % 2 == 0 )
                {
                    cout << numOne << "  ";
                    evenSum += numOne;  // saves each even num and adds it
                }
                
            }
            numOne = savedNumOne; // reset to orginal input value again

            break; // breaks out of the loop
        }          // end of if statment
        else
        {
            cout << "Error: The first number must be less than the "
                 << "second number. Please try again.\n";
        }
        
    }              // end of while statment

    // displays the sum of odd & even numbers seperatly
    cout << "\n\nSum of the even numbers between " << numOne << " and "
         << numTwo << ": " << evenSum;
    cout << "\nSum of the odd numbers between " << numOne << " and "
         << numTwo << ": " << oddSum << endl;

    return 0;
}