Write a program that graphically displays a working calculator for simple infix expressions that consist of single-digit operands; the operators +, -, *, and /; and parentheses. Make the following assumptions:

Unary operators (as in -2) are illegal.

All operations, including division, are integer operations.

The input expression contains no embedded spaces and no illegal characters, since it is entered by using a keypad.

The input expression is a syntactically correct infix expression.

Division by zero will not occur. (Consider how you can remove this restriction.)

The calculator has a display and a keypad of 20 keys, which are arranged as follows:

C < Q /

7 8 9 *

4 5 6 -

1 2 3 +

0 ( ) =

As the user presses keys to enter an infix expression, the corresponding characters appear in the display. The C (Clear) key erases all input entered so far; the 6 (Backspace) key erases the last character entered. When the user presses the = key, the expression is evaluated and the result replaces the expression in the display window. The user can then press C and enter another expression. If the user presses the Q (Quit) key, the calculator ceases operation and is erased from the screen.

Task: 1.

Create Interface for the ADT stack.

2. Create a Class of Stack

3. Create Calculator GUI

PROVIDE WITH THE OUTPUT.

Include screenshots of your code and Screenshots of your output ONLY

Algorithm Pseudocode Flowchart Use case diagram Class diagram Activity diagram Class responsibility diagram

ALTHOUG CODE ALSO