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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:

• display a hello message before presenting 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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Step 1

Program Algorithm-

START

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

"\n2 = Subtraction"

"\n3 = Multiplication"

"\n4 = Division"

"\n9 = exit"

cin >> choice;

switch (choice) {

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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