In this assignment, you will modify your basic calculator to be a little more user-friendly. Make these modifications:

1. If the user enters an invalid menu option, allow them to try again until they enter a valid one.
2. If the user chooses three invalid menu options in a row, give them a message about trying again later and end the program.
3. After the user chooses a valid menu option and your program computes and displays the result, you should start over again by displaying the menu. This should continue until the user chooses a Quit menu option.

Here are some example runs of the program:

Menu

1. Add
2. Subtract
3. Multiply
4. Divide
5. Generate random number
6. Quit

What would you like to do? 9

I'm sorry, 9 wasn't one of the options

Menu

1. Add
2. Subtract
3. Multiply
4. Divide
5. Generate random number
6. Quit

What would you like to do? 0

I'm sorry, 0 wasn't one of the options

Menu

1. Add
2. Subtract
3. Multiply
4. Divide
5. Generate random number 6. Quit

What would you like to do? 7

I'm sorry, 7 wasn't one of the options

Please try again later.

_____________________________________________________________________________________ Menu

1. Add
2. Subtract
3. Multiply
4. Divide
5. Generate random number
6. Quit

What would you like to do? 9

I'm sorry, 9 wasn't one of the options

Menu

1. Add
2. Subtract
3. Multiply
4. Divide
5. Generate random number 6. Quit

What would you like to do? 0

I'm sorry, 0 wasn't one of the options

Menu

1. Add
2. Subtract
3. Multiply
4. Divide
5. Generate random number
6. Quit

What would you like to do? 1 What is the first number? 3

What is the second number? 4

Answer: 7.0

Menu

1. Add
2. Subtract
3. Multiply
4. Divide
5. Generate random number 6. Quit

What would you like to do? 4

What is the first number? 6

What is the second number? 0

I'm sorry, you can't divide by zero.

Answer: NaN

Menu

1. Add
2. Subtract
3. Multiply
4. Divide
5. Generate random number