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Part I: Decimal and Hexadecimal Calculator. In this lab we will design a Calculator to add and subtract decimal or hexadecimal numbers according to user choice. If the user checks the Switch to hexadecimal box, the calculator will be hexadecimal Calculator otherwise it is Decimal Calculator. In Lab 03, we designed HexaDecimalNumber Class, to add hexadecimal numbers so you will use this class in the hexadecimal mode to add two hexadecimal numbers. Each button from 0 to 9 displays the specified number and each button from A to F to display the specified letter on the textbox, When the user presses + or - the textbox become empty to enter the second number, for sure when button pressed the result appear in the richTextBox. Also, there are two buttons which are Clear and DEL, where Clear to remove one digit from the entered number, and DEL to remove the entered number. Finally, Calculations History Button to show the history for all operations that user did. (Note: you will need to use List for this purpose).

          Part I: Decimal and Hexadecimal Calculator.
In this lab we will design a Calculator to add and subtract decimal or hexadecimal numbers according to user choice. If the user checks the
Switch to hexadecimal box, the calculator will be hexadecimal Calculator otherwise it is Decimal Calculator.
In Lab 03, we designed HexaDecimalNumber Class, to add hexadecimal numbers so you will use this class in the hexadecimal mode to
add two hexadecimal numbers.
Each button from 0 to 9 displays the specified number and each button from A to F to display the specified letter on the textbox, When the
user presses + or - the textbox become empty to enter the second number, for sure when button pressed the result appear in the
richTextBox.
Also, there are two buttons which are Clear and DEL, where Clear to remove one digit from the entered number, and DEL to remove the
entered number.
Finally, Calculations History Button to show the history for all operations that user did. (Note: you will need to use List for this purpose).

Part I: Decimal and Hexadecimal Calculator.
In this lab we will design a Calculator to add and subtract decimal or hexadecimal numbers according to user choice. If the user checks the
Switch to hexadecimal box, the calculator will be hexadecimal Calculator otherwise it is Decimal Calculator.
In Lab 03, we designed HexaDecimalNumber Class, to add hexadecimal numbers so you will use this class in the hexadecimal mode to
add two hexadecimal numbers.
Each button from 0 to 9 displays the specified number and each button from A to F to display the specified letter on the textbox, When the
user presses + or - the textbox become empty to enter the second number, for sure when button pressed the result appear in the
richTextBox.
Also, there are two buttons which are Clear and DEL, where Clear to remove one digit from the entered number, and DEL to remove the
entered number.
Finally, Calculations History Button to show the history for all operations that user did. (Note: you will need to use List for this purpose).

Added by Lacey J.

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