1. Problem Statement
Create a program that will open a given file and print the contained values. If there is not a file or the file is empty then display an error.
2. Requirements
2.1 Assumptions
Written in C++
Compiled exclusively in Visual Studio
File “in.dat” will be provided for testing
File will contain integers
2.2 Specifications
Array Size is 20
Two External Functions
Reading File to Array
Printing Array to Console
Assertion when array is empty
Decomposition Diagram
Program
Input
Read in file [in.dat]
Process
Fill array with integers from file
Output
Print filled array in order
Test Strategy
Valid Data
Invalid Data
Test Plan Version 1
Test Strategy
#
Description
Input
Expected Output
Actual Output
Pass/Fail
Valid Data
1
File Exists
Valid Data
2
File contains 20
good integers
readIntFile()
printFileValues()
Valid Data
3
File contains < 20
good integers
readIntFile()
printFileValues()
Invalid Data
1
File Does Not Exist
Initial Algorithm
Include Compiler Directives
“assert.h”
<iostream
<fstream
<string
Create External Functions
Create Function
Name: readIntFile()
Parameters: ifstreamby reference, integer array intArray[], int size, int lengthby reference
Return: void
Method:
Declare counter variable i= 0
Until end of file
Fill array at index i
Iterate i
Pass back length as i
Create Function
Name: printFileValues()
Parameters: integer array intArray[], integer lengthby reference
Return: Void
Method:
Assert that array has any values
Print array length
Loop until length reached
a. Print each array index formatted
Main Method main()
Prompt user for file name [in.dat]
Open file with given file name
If file is open
Call readIntFile()
Call printFileValues()
Else
Alert user that file does not exist
Test Plan Version 2
Test Strategy
#
Description
Input
Expected Output
Actual Output
Pass/Fail
Valid Data
1
File Exists
“in.dat”
Array Filled
Valid Data
2
File contains 20
“in.dat”
Array Filled
good integers
7
intArray[0] = 7
readIntFile()
8
intArray[1] = 8
printFileValues()
91011-1-30
intArray[2] = 9
intArray[3] = 10
intArray[4] = 11
15 88
99
intArray[5] = -1
intArray[6] = -3
200 15 99
intArray[7] = 0
intArray[8] = 15
8888 -2 0 -99
intArray[9] = 88
intArray[10] = 99
intArray[11] = 200
intArray[12] = 15
-300
intArray[13] = 99
intArray[14] = 8888
intArray[15] = -2
intArray[16] = 0
intArray[18] = -99
intArray[19] = -300
Valid Data
3
File contains < 20
“in2.dat”
intArray[0] = 404
good integers
404
intArray[1] = 6502
readIntFile()
6502
intArray[2] = 666
printFileValues()
666
intArray[3] = 8088
8088
intArray[4] = 7
7
intArray[5] = 42
42
Invalid Data 1 File Does Not Exist “in.txt’ FILE DNE
