Talking Calculator
Project Description:
This project creates a very simple calculator that will do the four basic arithmetic operations, + - x /.
The result of the calculation will be displayed on the screen and converted to speech.
Simple error checking will be introduced.
This program will use:
numbers to text
text to speech
building a sentence
mathematical calculations
textboxes for input
labels for output
events to change labels and perform calculations
basic error checking
Notifier to issue error messages
Set up the User Interface (UI)
The UI (User interface)
The ? is the lblOperator and will be changed based on the operation button clicked
The Required Components
Make sure you set the TextBoxes to accept numeric input only.
Get the Basic Code Working
Basic Code for the Add Button:
Modifications -- Check for errors
Modify the code you have to check for
Errors to check for:
the calculator requires two numbers to perform calculations, issue message if 2 number are not entered.
This code will need to be further modified to check for the divide by 0 error
Now get all four buttons working
Create the code for the - x and / buttons
Extra error checking will be needed for the / button -- Why? What is the extra check?