Description: The software is a calculator program, the user can turn the mouse input parameter values calculated, add, subtract, multiply, divide the mixture operation.
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File list (Check if you may need any files):
chap2\ComputerPad$1.class
.....\ComputerPad.class
.....\ComputerPad.java
.....\NumberButton.class
.....\NumberButton.java
.....\OperationButton.class
.....\OperationButton.java
chap2