» »Unlabelled » cs201 assignment 3 solution

0 10:08 PM
CS201 - Introduction to Programming Assignment No. 3 Solution and Discussion Spring 2015 Due Date Jul 10, 2015
Assignment No. 03
Semester: Spring 2015
CS201: Introduction to Programming
Total Marks: 20
Due Date: 10/07/2015
Lectures covered: 17 to 23

Please read the following instructions carefully before submitting assignment.
It should be clear that your assignment will not get any credit if:

  • The assignment is submitted after due date.
  • The submitted assignment does not open or file is corrupt.
  • Assignment is copied(partial or full) from any source (websites, forums, students, etc)


Objective

The objective of this assignment is:
  • Learn to code, edit, compile and execute C++ program.
  • Learn to manipulate and navigate through text files.
  • Learn to create and use user defined functions.
  • Learn to use string manipulation functions.
Guidelines

  • Code should properly be indented and well commented.
  • Follow C/C++ naming conventions while using variables, functions etc.
  • Use only Dev-C++ for this assignment. If you are using any other tool then mention it at top of your code file as comments.

Assignment Description

In this assignment, you are required to write c++ code that will protect the provided text file using the protection mechanism given in guidelines. It will also check the security of file and if any change is made in the contents of protected file, it will point out the file as changed.

Protection mechanism:
The program will protect the file by generating a protection key on the basis of contents of the file. The key will be saved at the end of the file with “%” symbol as prefix. This key will be used to detect either the file contents are changed or not e.g. if file contents are changed the new key generated will not match the existing one, leading to conclusion that file contents have been changed.

Solution guidelines
The program should operate in following sequence.
  • Program will prompt the user to enter the file name in current directory.
  • System will show a menu with two options:
    • Protect the file
    • Check security status
  • In case user selects the first option (i.e. protect the file), the system will perform the following steps:
    • Read the file
    • Check if the file is already protected or not.
    • In case if file is not protected, program will protect it by the protection mechanism defined above.
    • If file is already protected, system will display appropriate message and exit.
  • If user selects the second option (i.e. check security status), the system will perform following steps:
    • Read the entire file and if key does not exist (i.e. file is not already protected), program will display the message to protect the file first and display menu.
    • If file is already protected, the system will read the contents along with the already existing key. On the basis of contents read, a new key will be generated. If this new key and the existing one (read from the file) do not match, it means that the contents of protected file are changed and vice versa.

Important note
A text file (data.txt) is attached with assignment, use it for protection checking. Video file (Output-Demo.mp4) of desired function is also attached with assignment. Watch the demo video carefully to understand the required functionality (output) of program. Your program should work as per functionality performing in demo video file. You do not need to send text file with your solution. Just upload .cpp file from your LMS account. For any query related to assignment no. 3 contact us at cs201@vu.edu.pk.
Submission
You are required to submit your solution C++ program through LMS i.e. .cpp file.


Lorem Ipsum is simply dummy text of the printing and typesetting industry. 
Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, 
when an unknown prindfdtersd took a was galley of type and scrambled it to make a type specimen
book. It has survived not only five centuries, but also the leap into electronic 
typesetting, remaining essentially unchanged. It was popularised in the 1960s with the 
release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop
publishing software like Aldus PageMaker including versions of Lorem Ipsum.


Posted by

Post a Comment

0 comments

Dear readers, after reading the Content please ask for advice and to provide constructive feedback Please Write Relevant Comment with Polite Language.Your comments inspired me to continue blogging. Your opinion much more valuable to me. Thank you.

Monday, July 6, 2015

cs201 assignment 3 solution

CS201 - Introduction to Programming Assignment No. 3 Solution and Discussion Spring 2015 Due Date Jul 10, 2015
Assignment No. 03
Semester: Spring 2015
CS201: Introduction to Programming
Total Marks: 20
Due Date: 10/07/2015
Lectures covered: 17 to 23

Please read the following instructions carefully before submitting assignment.
It should be clear that your assignment will not get any credit if:

  • The assignment is submitted after due date.
  • The submitted assignment does not open or file is corrupt.
  • Assignment is copied(partial or full) from any source (websites, forums, students, etc)


Objective

The objective of this assignment is:
  • Learn to code, edit, compile and execute C++ program.
  • Learn to manipulate and navigate through text files.
  • Learn to create and use user defined functions.
  • Learn to use string manipulation functions.
Guidelines

  • Code should properly be indented and well commented.
  • Follow C/C++ naming conventions while using variables, functions etc.
  • Use only Dev-C++ for this assignment. If you are using any other tool then mention it at top of your code file as comments.

Assignment Description

In this assignment, you are required to write c++ code that will protect the provided text file using the protection mechanism given in guidelines. It will also check the security of file and if any change is made in the contents of protected file, it will point out the file as changed.

Protection mechanism:
The program will protect the file by generating a protection key on the basis of contents of the file. The key will be saved at the end of the file with “%” symbol as prefix. This key will be used to detect either the file contents are changed or not e.g. if file contents are changed the new key generated will not match the existing one, leading to conclusion that file contents have been changed.

Solution guidelines
The program should operate in following sequence.
  • Program will prompt the user to enter the file name in current directory.
  • System will show a menu with two options:
    • Protect the file
    • Check security status
  • In case user selects the first option (i.e. protect the file), the system will perform the following steps:
    • Read the file
    • Check if the file is already protected or not.
    • In case if file is not protected, program will protect it by the protection mechanism defined above.
    • If file is already protected, system will display appropriate message and exit.
  • If user selects the second option (i.e. check security status), the system will perform following steps:
    • Read the entire file and if key does not exist (i.e. file is not already protected), program will display the message to protect the file first and display menu.
    • If file is already protected, the system will read the contents along with the already existing key. On the basis of contents read, a new key will be generated. If this new key and the existing one (read from the file) do not match, it means that the contents of protected file are changed and vice versa.

Important note
A text file (data.txt) is attached with assignment, use it for protection checking. Video file (Output-Demo.mp4) of desired function is also attached with assignment. Watch the demo video carefully to understand the required functionality (output) of program. Your program should work as per functionality performing in demo video file. You do not need to send text file with your solution. Just upload .cpp file from your LMS account. For any query related to assignment no. 3 contact us at cs201@vu.edu.pk.
Submission
You are required to submit your solution C++ program through LMS i.e. .cpp file.


Lorem Ipsum is simply dummy text of the printing and typesetting industry. 
Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, 
when an unknown prindfdtersd took a was galley of type and scrambled it to make a type specimen
book. It has survived not only five centuries, but also the leap into electronic 
typesetting, remaining essentially unchanged. It was popularised in the 1960s with the 
release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop
publishing software like Aldus PageMaker including versions of Lorem Ipsum.


Posted by at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)