Write an OOP program in Python(PyQt) to display and add functionality to a simple calculator.

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Assignment 1

Write an OOP program in Python(PyQt) to display and add functionality to a simple calculator.

 

Program should use one or more stacks based on the algorithm for evaluating an infix expression provided below.

 

User should be able to interact with calculator by pressing the buttons, which should display in an input field the values of the keys pressed. Upon pressing the "=" sign, the expression should be evaluated, and the answer displayed in the input field or an error message returned to the user.

 

 

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