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(Solved) CMSC 350 Project 2 The second programming project involves writing a program that accepts an arithmetic expression of unsigned integers in postfix...


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I am having trouble with this project getting to write to file. PLEASE HELP.

The second programming project involves writing a program that accepts an arithmeticexpression of unsigned integers in postfix notation and builds the arithmetic expression tree thatrepresents that expression. From that tree, the corresponding fully parenthesized infix expressionshould be displayed and a file should be generated that contains the three address formatinstructions. This topic is discussed in the week 4 reading in module 2, section II-B. The mainclass should create the GUI shown below:The GUI must be generated by code that you write. You may not use a drag-and-drop GUIgenerator.Pressing the Construct Tree button should cause the tree to be constructed and using that tree, thecorresponding infix expression should be displayed and the three address instruction file shouldbe generated.The postfix expression input should not be required to have spaces between every token. Note inthe above example that 9+- are not separated by spaces.The above example should produce the following output file containing the three addressinstructions:Add R0 5 9Sub R1 3 R0Mul R2 2 3Div R3 R1 R2It is not necessary to reuse registers within an expression as shown in module 2, section II-B, andyou can assume there are as many available as needed. Each new expression should, however,begin using registers starting at R0.Inheritance should be used to define the arithmetic expression tree. At a minimum, it shouldinvolve three classes: an abstract class for the tree nodes and two derived classes, one foroperand nodes and another for operator nodes. Other classes should be included as needed toaccomplish good object-oriented design. All instance data must be declared as private.You may assume that the expression is syntactically correct with regard to the order of operatorsand operands, but you should check for invalid tokens, such as characters that are not validoperators or operands such as 2a, which are not valid integers. If an invalid token is detected a 2RuntimeException should be thrown and caught by the main class and an appropriate errormessage should be displayed. Below is an example:

CMSC 350 Project 2
The second programming project involves writing a program that accepts an arithmetic
expression of unsigned integers in postfix notation and builds the arithmetic expression tree that
represents that expression. From that tree, the corresponding fully parenthesized infix expression
should be displayed and a file should be generated that contains the three address format
instructions. This topic is discussed in the week 4 reading in module 2, section II-B. The main
class should create the GUI shown below: The GUI must be generated by code that you write. You may not use a drag-and-drop GUI
generator.
Pressing the Construct Tree button should cause the tree to be constructed and using that tree, the
corresponding infix expression should be displayed and the three address instruction file should
be generated.
The postfix expression input should not be required to have spaces between every token. Note in
the above example that 9+- are not separated by spaces.
The above example should produce the following output file containing the three address
instructions:
Add
Sub
Mul
Div R0
R1
R2
R3 5 9
3 R0
2 3
R1 R2 It is not necessary to reuse registers within an expression as shown in module 2, section II-B, and
you can assume there are as many available as needed. Each new expression should, however,
begin using registers starting at R0.
Inheritance should be used to define the arithmetic expression tree. At a minimum, it should
involve three classes: an abstract class for the tree nodes and two derived classes, one for
operand nodes and another for operator nodes. Other classes should be included as needed to
accomplish good object-oriented design. All instance data must be declared as private.
You may assume that the expression is syntactically correct with regard to the order of operators
and operands, but you should check for invalid tokens, such as characters that are not valid
operators or operands such as 2a, which are not valid integers. If an invalid token is detected a
1 RuntimeException should be thrown and caught by the main class and an appropriate error
message should be displayed. Below is an example: You are to submit two files.
1. The first is a .zip file that contains all the source code for the project, which includes
any code that was provided. The .zip file should contain only source code and nothing
else, which means only the .java files. If you elect to use a package the .java files
should be in a folder whose name is the package name.
2. The second is a Word document (PDF or RTF is also acceptable) that contains the
documentation for the project, which should include the following:
a. A UML class diagram that includes all classes you wrote. Do not include
predefined classes. You need only include the class name for each individual
class, not the variables or methods
b. A test plan that includes test cases that you have created indicating what aspects
of the program each one is testing
c. A short paragraph on lessons learned from the project 2 Grading Rubric:
Criteria Design Functionality Test Cases Documentation Overall Score Meets
5 points
GUI is hand coded and matches
required design (1)
Inheritance hierrachy with at least
3 classes is used (2)
Other classes are used to support
good object-oriented design (1)
All instance data is private (1)
10 points
Produces correct fully
parenthesized infix expressions for
all input (3) Does Not Meet
0 points
GUI is generated by a GUI generator or
does not match required design (0)
Inheritance hierrachy not used or has less
than 3 classes (0)
Does not use other classes to support
good object-oriented design (0)
Some instance data is not private (0)
0 points
Does not produce correct fully
parenthesized infix expressions for some
input (0) Produces correct three address
file for all input (3)
Correctly parses expressions
without space delimiters (2)
Registers restart at R0 on each
new expression (1)
Detects invalid tokens (1)
5 points
All operators included in test cases
(2)
Test cases include expressions
without spaces (1)
Test cases include a case to test
invalid token beginning with a
digit (1)
Test cases include a case to test
invalid operators (1)
5 points
Correct UML diagram included (2)
Lessons learned included (2)
Comment blocks with class
description included with each
class (1)
Meets
16 or more Does not produce correct three address
file for some input (0)
Does not correctly parse expressions
without space delimiters (0)
Registers do not restart at R0 on each
new expression (0)
Does not detect invalid tokens (0)
0 points
Some operators not included in test cases
(0)
Test cases don't include expressions
without spaces (0)
Test cases do not include a case to test
invalid token beginning with a digit (0)
Test cases do not include a case to test
invalid operators (0)
0 points
Correct UML diagram not included (0)
Lessons learned not included (0)
Comment blocks with class description
not included with each class (0)
Does not meet
0-15 3

 


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