pseudocode

pseudocode

Functions
In this homework, you will design a program to perform the following task:
Design and write a program, using functions, that calculates the area and perimeter of a rectangle whose dimensions (length and width) are provided by a user.
There are 4 components of your submission including:
•    Program Description- A detailed, clear description of the program you are building.
•    Analysis- Demonstrates your thought process and steps used to analyze the problem. Be sure to include the required input and output and how you will obtain the required output from the given input? Also, include your variable names and definitions. Be sure to describe the necessary formulas and sample calculations that might be needed. Talk about how your design will allow any number of students and final grades to be possible inputs.
•    Test plan – Prepare at least 3 sets of input data (Test data) along with their expected output for testing your program. Your test data can be presented in the form of a table as follows (note: feel free to adapt to your design)
•    Pseudocode- Provide pseudocode of your overall design that fulfills the requirements of the project
All of these components should be placed in word document for submission.
Example application test data:
Test Case #    Input    Expected Output
1    Length =4.0, Width=8.0    Area = 32
Perimeter = 24
2    Your input data    Your expected output
3    Your input data    Your expected output
Submission requirements:
Your completed assignment should be saved as Word document and submitted to your LEO assignment area no later than the due date listed in the syllabus. Your document should be neat, well-written with minimal grammatical and spelling errors. Your name should be clearly listed on the first page along with the class/section, professor and due date. Your document should contain page numbers at the bottom of each page. Single or double space line formatting is acceptable.
You should name the file yournamehw4.docx (or yournamehw4.doc). So if my name was Julie Smith, I would name my document juliesmithhw4.docx.

CMIS 102 Hands-On Lab
// Week 5
Overview:
This hands-on lab allows you to follow and experiment with the critical steps of developing a program including the program description, analysis, test plan, design (using pseudocode visualization), and implementation with C code.  The example provided uses sequential, repetition statements and nested repetition statements.
Program Description:
This program will calculate the average of 3 exams for 5students. The program will ask the user to enter 5 student names. For each of the students, the program will ask for 3 exam scores. The average exam score for each student will be calculated and printed.
Analysis:
I will use sequential and repetitionprogramming statements.
I will define oneString to store student name: StudentName.
I will define three Float numbers: Examvalue, Sum, Avg to store exam values the sum of the exams and the average of the exams.
The sum will be calculated by this formula:
Sum = Sum + Examvalue
For example, if the first value entered was 80.0 and second was 90.0 and the third exam was 100.0:
sum = sum + Examvalue = 0.0 + 80.0
sum = 80.0 + 90.0 = 170.0
sum = 170.0 + 100.0 = 270.0
Avg is then calculated as:
Avg = sum/3.0
For example 270.0/3.0 = 90.0
A nested repetition loop can be used to loop through each of the 5 students and each of the 3 exams:
For (students=0; students <5; students++)
For (exams=0;exams<3;exams++)
End For
End For
Sum values will need to be reset for each student to ensure only one student data is used for calculations each time.

Test Plan:
To verify this program is working properly the input values could be used for testing:
Test Case    Input    Expected Output
1    Studentname=Chris
Examvalue1=80.0
Examvalue2=90.0
Examvalue3=100.0
Studentname=John
Examvalue1=70.0
Examvalue2=90.0
Examvalue3=80.0
Studentname=Sally
Examvalue1=100.0
Examvalue2=100.0
Examvalue3=100.0
Studentname=Pat
Examvalue1=50.0
Eexamvalue2=70.0
Examvalue3=60.0
Studentname=Sam
Examvalue1=90.0
Examvalue2=95.0
Examvalue3=100.0
Average for Chris is 90.0
Average for John is 80.0
Average for Sally is 100.0
Average for Pat is 60.0
Average for Sam is 95.0

Pseudocode:
// This program will calculate the average of 3 exams for 5 students
// Declare variables
Declare StudentName as String
Declare ExamValue, Sum, Avg as Float

// Loop through 5Students
For (students=0; students <5 ; students++)
// reset Sum to 0
Set Sum =0.0
Print “Enter Student Name”
Input StudentName
// Nested Loop for Exams
For (exams=0; exams < 3; exams++)
Print “Enter exam grade: \n”
Input ExamValue
Set Sum = Sum + ExamValue
End For
Set Avg = Sum/3.0
Print “Average for “ + StudentName + “ is “ + Avg
End For

Flow Chart:

C Code
The following is the C Code that will compile in execute in the online compilers.
// C code
// This program will calculate the average of 3 exams for 5 students.
// Developer: Faculty CMIS102
// Date: Jan 31, 2014
#include <stdio.h>
int main ()
{
/* variable definition: */
charStudentName[100];
floatExamValue, Sum, Avg;
intstudents,exams;
// Loop through 5 Students
for (students=0; students <5 ; students++)
{
// reset Sum to 0
Sum =0.0;
printf(“Enter Student Name \n”);
scanf(“%s”, StudentName);
// Nested Loop for Exams
for (exams=0; exams < 3; exams++)
{
printf (“Enter exam grade: \n”);
scanf(“%f”, &ExamValue);
Sum = Sum + ExamValue;
}
Avg = Sum/3.0;
printf( “Average for %s is %f\n”,StudentName,Avg);
}
return 0;
}

Setting up the code and the input parameters in ideone.com:
Note the Student and ExamValues for this run were:
John: 90.0 80.0 100.0
Jim: 80.0 70.0 90.0
Joe: 70.0 100.0 100.0
Sally: 100.0 95.0 91.0
Sam: 30.0 54.0 68.0
You can change these values to any valid integer values to match your test cases.

Results from running the programming at ideone.com:

Learning Exercises for you to try:
1.    What would you change in the design and the code if you wanted to input 10 students and 5 exams?
2.    What is the line of code doing?

charStudentName[100];

(Hint: We haven’t covered arrays, but a String can be thought of as an array of characters) ?

3.    What would happen if you moved the Set Sum = 0.0 from inside the for loop to right after the declaration. For example:
// Declare variables
Declare StudentName as String
Declare ExamValue, Sum, Avg as Float
// Initialize Sum
Set Sum = 0.0;

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