$29
Program #3 Solution
1. Implementing data validation
2. Implementing an accumulator
3. Integer arithmetic
4. Defining variables (integer and string)
5. Using library procedures for I/O
6. Implementing control structures (decision, loop)
Problem Definition
Write a MASM program to perform the following tasks:
Display the program title and programmer’s name.
Display instructions for the user
Repeatedly prompt the user to enter the number. Validate the user input to be in [-100, -1] (inclusive). Count and accumulate the valid user numbers until a non-negative number is entered (The non-negative number is discarded) Calculate the (rounded integer) average of the negative numbers
Display:
the number of negative numbers entered (Note: if no negative numbers were entered, display a special message and display the
goodbye message with the user's name at the end)
the sum of negative numbers entered
the average, rounded to the nearest integer (e.g., -20.5 rounds to -21)
a goodbye message that includes the user’s name, and terminate the program.
Requirements
1. The programmer’s name and the user’s name must appear in the output.
2. The main procedure must be modularized into commented logical sections (procedures are not required this time).
3. Recursive solutions are not acceptable for this assignment. This one is about iteration.
4. The program must be fully documented. This includes a complete header block for identification, description, etc., and a comment outline to explain each section of code.
5. The lower limit must be defined and used as a constant.
6. The usual requirements regarding documentation, readability, user-friendliness, etc., apply.
Notes
1. There are no new concepts in this programming assignment. It is given for extra practice, to keep MASM fresh in your mind while we study internal/external data representation and error detection/correction.
2. This is an integer program. Even though it would make more sense to use floating-point computations, you are required to do this one with integers.
Example Program Operation
Welcome to the Integer Accumulator by Austin Miller
What’s your name? Roger
Hello, Roger
Please enter numbers in [-100, -1].
Enter a non-negative number when you are finished to see results.
Enter number: -15
Enter number: -100
Enter number: -36
Enter number: -200
Invalid number, please enter numbers in [-100, -1].
Enter number: -10
Enter number: 0
You entered 4 valid numbers.
The sum of your valid numbers is -161
The rounded average is -40
Thank you for playing Integer Accumulator!
Goodbye, Roger.
Extra Credit Option (original definition must be fulfilled)
(1 pt) Calculate and display the average as a floating-point number, rounded to the nearest .001.
Remember, in order to ensure you receive credit for any extra credit work, you must add one print statement to your program output PER EXTRA CREDIT which describes the extra credit you chose to work on. You will not receive extra credit points unless you do this. The statement must be formatted as follows...
--Program Intro--
**EC: DESCRIPTION
--Program prompts, etc--
Please refer back to the documentation for Program 1 to see a sample of the extra credit format.
Program 3 Rubric
Criteria
Ratings
Files Correctly Submitted
1 pts
0 pts
Submitted file is correct assignment and is an individual .asm file.
Full Marks
No Marks
Program Assembles & Links
2 pts
0 pts
Submitted program assembles and links without need for clarifying work for
Full Marks
No Marks
TA and/or messages to the student.
This assumes the program is actually an attempt at the assignment. Non-
attempts which compile/link earn no points.
Documentation - Identification Block - Header
1 pts
0 pts
Name, Date, Program number, etc as per syllabus are included in
Full Marks
No Marks
Identification Block
Documentation - Identification Block - Program Description
2 pts
0 pts
Description of functionality and purpose of program is included in
Full Marks
No Marks
identification block.
Documentation - Section Comments
4 pts
0 pts
Code section headers describe functionality and implementation of
Full Marks
No Marks
program flow. Should mirror the style guide image.
Pts
• pts
2 pts
• pts
2 pts
4 pts
Criteria
Ratings
Documentation - In-line Comments
1 pts
0 pts
In-line comments contribute to understanding of program flow (from section
Full Marks
No Marks
comments) but are not line-by-line descriptions of moving memory to
registers.
Verification - Program Executes
5 pts
0 pts
Program executes and makes some attempt at the assigned functionality.
Full Marks
No Marks
Completeness - Displays Programmer Name
1 pts
0 pts
Program prints out the programmer's name.
Full Marks
No Marks
Completeness - Gets / Uses User's name
2 pts
0 pts
Receives input with ReadString. Saves input in a null-terminated BYTE
Full Marks
No Marks
array. Greets user (e.g. "Hello, Username")
Completeness - Displays Introduction
1 pts
0 pts
Displays program introduction. Program introduction should describe
Full Marks
No Marks
functionality of program.
Completeness - Prompt for Input
2 pts
0 pts
Prompts user to enter data, specifying bounds of acceptable inputs.
Full Marks
No Marks
Pts
1 pts
• pts
1 pts
2 pts
• pts
2 pts
Criteria
Ratings
Pts
Completeness - Gets data from user
1 pts
0 pts
Utilizes ReadInt to receive user input. Saves values in appropriately-named
Full Marks
No Marks
1 pts
identifiers for validation.
Completeness - Validates User Data
4 pts
2 pts
0 pts
Validates that user-entered values are within the advertised limits.
Full
Partial validation
No
Marks
Validates only one end or neglects to check
Marks
4 pts
edge cases.
No
validation
Completeness - Displays Results (number of valid numbers, sum, and
4 pts
2 pts
0 pts
rounded average)
Full Marks
Partial Display
No Marks
4 pts
display a special message if no negative numbers were entered (-2 if
missed)
Completeness - Displays Closing Message
1 pts
0 pts
1 pts
Full Marks
No Marks
Correctness - Number of Valid Numbers
2 pts
1 pts
0 pts
Correct number of valid numbers is displayed.
Full
Incorrect for small numbers
No
Marks
Correct number of valid numbers for values
Marks
2 pts
greater than 2, but fails for one or more of the
following values (0, 1, 2)
Criteria
Ratings
Pts
Correctness - Calculation of rounded average is correct
3 pts
2 pts
0 pts
Full Marks
Calculates average but not rounded
No Marks
3 pts
Correctness - Calculation of Sum is correct
3 pts
0 pts
3 pts
Full Marks
No Marks
Requirements - Solution is non-recursive
1 pts
0 pts
1 pts
Full Marks
No Marks
Lower limit is defined and used as a constant
1 pts
0 pts
1 pts
Full Marks
No Marks
Requirements - Well-Modularized
4 pts
0 pts
Program is divided into logical sections, separated by Section Comment
Full Marks
No Marks
4 pts
blocks.
Coding Style - Appropriately named identifiers
2 pts
1 pts
0 pts
Identifiers named so that a person reading the code can intuit the purpose
Full
Partial
No
of a variable, constant, or label just by reading its name.
Marks
Some identifiers are named well, with others
Marks
2 pts
having no relevance to their functionality.
Criteria
Ratings
Pts
Coding Style - Readabilty
2 pts
1 pts
0 pts
Program uses readable white-space, indentation, and spacing as per the
Full
Marginally Readable
No
Indentation Style Guide. Logical sections are separated by white space.
Marks
Program is marginally readable but lacks proper
Marks
2 pts
alignment and white space.
(1pt) Extra Credit for rounded average
0 pts
0 pts
Rounded average is rounded to the nearest .001.
Full Marks
No Marks
0 pts
Late Penalty
0 pts
0 pts
Remove points here for late assignments. (Enter negative point value, 15%
Full Marks
No Marks
0 pts
of 'earned' points per day late)
Total Points: 50
