COSC-1336-Programming-Fundamentals/Module 3/Module3LabWeek2Calculator.cpp at main · reycarrorg/COSC-1336-Programming-Fundamentals · GitHub

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//************************************************************************
// Author: Rolando Rey Carreon
// Date: Mar 7 2025
// Language: C++
// Assignment: Module 3 Lab Week 2 Calculator
// Description: In this lab i will writee a c++ program that implements a
//              simple calculator using a switch statement.
//************************************************************************

#include<iostream>
using namespace std;

int main()
{
    // declare local variables
    int menuChoice;
    int valueOne, valueTwo;
    int result;

    // prompt menu that asks the user to choose a listed choice,
    // keeps reprompting on valid and invalid choice till exit '0'
    do {

        //display menu and get the user choice
        cout << "Calculator Menu:\n"
             << "1. Addition\n"
             << "2. Subtraction\n"
             << "3. Multiplication\n"
             << "4. Division\n"
             << "0. Exit\n"
             << "Enter your choice: ";
        cin >> menuChoice;

        // switch containing 5 menu items and default
        switch(menuChoice)
        {
            // menu choice 1 prompts for two values to add
            case 1:
                cout << "Enter the first number: ";
                cin  >> valueOne;
                cout << "Enter the second number: ";
                cin  >> valueTwo;

                // addition formula saves to result int
                result = valueOne + valueTwo;

                // displays result and reprompt menu
                cout << "Result: " << result << endl << endl;

                break;

            // menu choice 2 prompts for two values to subtract
            case 2:
                cout << "Enter the first number: ";
                cin  >> valueOne;
                cout << "Enter the second number: ";
                cin  >> valueTwo;

                // subtraction formula saves to result int
                result = valueOne - valueTwo;

                // displays result and reprompt menu
                cout << "Result: " << result << endl << endl;

                break;

            // menu choice 3 prompts for two values to multiply
            case 3:
                cout << "Enter the first number: ";
                cin  >> valueOne;
                cout << "Enter the second number: ";
                cin  >> valueTwo;

                // multiplication formula saves to result int
                result = valueOne * valueTwo;

                // displays result and reprompt menu
                cout << "Result: " << result << endl << endl;

                break;

            // menu choice 4 prompts for two values to divide
            case 4:
                cout << "Enter the first number: ";
                cin  >> valueOne;
                cout << "Enter the second number: ";
                cin  >> valueTwo;

                // division formula saves to result int
                result = valueOne / valueTwo;

                // if division result is 0 display error and reprompt menu
                // else display the result and reprompt menu
                if ( result == 0 )
                {
                    cout << "Division by Zero is undefined.\n\n";

                } else
                    cout << "Result: " << result << endl << endl;

                break;

            // menu choice 0 displays exit message and ends program
            case 0:
                cout << "Exiting the calculator. Goodebye!\n";

                break;

            // any not listed choice will display as invalid and reprompt
            default:
                cout << "that is not a valid option.\n\n";

                break;

        }   // end of switch

    } while (menuChoice != 0); // reprompts until user selects 0 to quit

    // padding
    cout << endl << endl;

    return 0;
}