In Lab 2, you created a menu for a simple calculator program. In Lab 6, you added some functionality based on the user selection. In this lab, you will add some more functionality to the program. Use loops to keep running the program until the user chooses the exit condition (9). When dividing, use a loop to validate user input, making sure the denominator (second number) is not zero. If the user enters a 0 for the second number, display an error message and keep prompting until a non-zero number is entered.1)   Add two numbers2)   Subtract two numbers3)   Multiply two numbers4)   Divide two numbers9)   Exit programThe program should:contain header comments as shown in classdisplay a hello message before presenting the menudisplay the menuprompt user for selectionecho the selection back to the userif the selection was invalid, display error message to user and then loop back to menuif the selection was valid, prompt the user for two numbersif the operation is division, and the second number is zero, display error message to user and then loop (with new prompt) until non-zero number is enteredfor any other scenario, perform the operation and display the resultsuse loop to present menu again and ask for another selectioncontinue looping until user selects exit conditiondisplay a goodbye message before exiting the programHINT: The loop should continue until some condition is false. What is that condition? When should it be set false? Consider using a flag variable for the loop... Make it as simple as you can please. :DLanguage is C++

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Asked Oct 9, 2019
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In Lab 2, you created a menu for a simple calculator program. In Lab 6, you added some functionality based on the user selection. In this lab, you will add some more functionality to the program. Use loops to keep running the program until the user chooses the exit condition (9). When dividing, use a loop to validate user input, making sure the denominator (second number) is not zero. If the user enters a 0 for the second number, display an error message and keep prompting until a non-zero number is entered.

1)   Add two numbers2)   Subtract two numbers3)   Multiply two numbers4)   Divide two numbers

9)   Exit program

The program should:

  • contain header comments as shown in class
  • display a hello message before presenting the menu
  • display the menu
  • prompt user for selection
  • echo the selection back to the user
  • if the selection was invalid, display error message to user and then loop back to menu
  • if the selection was valid, prompt the user for two numbers
  • if the operation is division, and the second number is zero, display error message to user and then loop (with new prompt) until non-zero number is entered
  • for any other scenario, perform the operation and display the results
  • use loop to present menu again and ask for another selection
  • continue looping until user selects exit condition
  • display a goodbye message before exiting the program

HINT: The loop should continue until some condition is false. What is that condition? When should it be set false? Consider using a flag variable for the loop...

 

Make it as simple as you can please. :D

Language is C++

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Expert Answer

Step 1

Program Algorithm-

START

Step1 Import essential headers.

Step2 Define main function

Step3 Print “Hello user” message.

Step4 Declare variables and their datatypes accordingly as per the usage.

Step5 Initialize the flag variable as true

Step6 Display the choices for the user.

Step7 Perform operations on variables as per the choice of user.

Step8 Print the result for each choice as per need of the user.

Step9 Exit the program and print the “Goodbye” message.

END

Step 2

Source Code-

# include <iostream>

using namespace std;

int main()

{

cout<<"Hello User";

//declare choice as integer datatype

    int choice;

//declare num1 and num2 as long datatype

    long num1, num2, x;

//declare proceed as char datatype

    char proceed;

  //initializing the flag variable

    bool flag = true;

    while (flag)

  {

//to display choices

    cout << "Please choose your option:"

        "\n1 = Addition"

        "\n2 = Subtraction"

        "\n3 = Multiplication"

        "\n4 = Division"

        "\n9 = exit"

        "\n\nEnter your Choice: ";

        cin >> choice;

        switch (choice) {

            //Addition

            case 1:

                cout << "Enter two numbers: \n";

                cin >> num1 >> num2;

                x = num1 + num2;

                cout << "Sum = " << x;

                break;

 

                //Subtraction

            case 2:

                cout << "Enter two numbers: \n";

                cin >> num1 >> num2;

                x = num1 - num2;

                cout << "Subtraction = " << x;

                break;

 

                //Multiplication

            case 3:

                cout << "Enter two numbers: \n";

                cin >> num1 >> num2;

    &nb...

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