Anne Dawson: CSCI110A_HW2_SP04.htm

First created: Thursday 29th January 2004, 6:53 PT, AHD

This document is subject to change without notice.

Please report any errors or omissions in this document:

adawson@coquitlamcollege.com

For due date, see course schedule.

Special instructions: Each student must complete this homework.

CSCI110A Homework 2

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Specification:

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The area of a triangle can be computed using the formula:

area = Ö (s(s-a)(s-b)(s-c))

where a, b and c are the lengths of the sides, and s is the

semiperimeter:

s = (a + b + c) / 2

Write a VB program with a function that uses four parameters

(a, b, c, s) and computes the area. a, b, and c are entered in

text boxes. s is also calculated using a function with 3 parameters

for a, b and c.

Produce an error message in a message box for illegal combinations

of sides; for example if any side is 0 or negative.

For legal triangles the following rules apply:

a < (b + c)

b < (c + a)

c < (a + b)

Marking Scheme :

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The following marking scheme applies:

Course Code: CSCI110A

Semester: SP04

Assignment Code: HW2

Lab Specification: Area of triangle

Instructor Name: Dr Anne Dawson

Student Name:

Student Number:

DESIGN

1. Appropriate data types are used. /10

2. Appropriate control structures are used

(i.e. loops and decisions). /10

3. The User Interface (output to the screen) is

clear and tidy. /10

MAINTAINABILITY

4. The program is commented appropriately - including

programmer name, date and filename. /10

5. The program has meaningful identifiers. /10

6. The program is indented (spaced out) correctly, to

aid the understanding of the code. /10

7. The code is easy to follow. /10

CORRECTNESS:

8. The program contains zero errors /10

9. Appropriate test data and results

are shown in the comments at the top of the code.

An appropriate number and variety of test data

sets is supplied. /10

10. The program is complete. /10

Total: /100

Date: