Program for implementation of a data storage system, C/C++ Programming

Assignment Help:

Introduction: 

This assignment requires a knowledge of variables (integers, char types), loops, conditionals, switch, functions, char arrays, string arrays, number arrays, structs, character input and output, file I/O, string functions, static and function calls.   

The assignment:

Develop and submit an original implementation of a Data Storage System. The user will be presented with a login screen based on the solution to assignment 2. Once logged in, the user will be presented with a menu offering the following options:

New Application

View Applications

Delete Application

New User

New Application added functionality of data storage in a loan file. Assume that all data fields are compulsory. View Applications will present a numbered list of 1-line summaries of each stored application. Only the name and application date will be displayed. The user can select an application (by typing its number) to see the entire application.

Delete will display the same numbered list, but the application data will be deleted from the loan file if the user selects an entry.  New User will prompt for a user name and password.  The user name must not already be in use.  The new user name and password hash will be written to the passwd file.      

  • This assignment must be written in C and must compile and run on BA computer lab PCs using Quincy 2005 v1.3. Build options must include Strict ANSI/ISO compliance, C99 support and must compile with no warnings when the All Warnings option is selected.
  • Your code must have appropriate comments including your names and student numbers, the name of the .c file, the purpose of the program, brief explanations of variables and explanations of any code which is not obvious to another programmer.
  • All code can be placed in user-defined functions. The main function should only contain the opening menu system and relevant function calls.
  • Bonus marks (5% of the total mark for the assignment) will be awarded if the arrays of loan and applicant structs are allocated dynamically (using malloc(). The alternative (without the bonus marks) is to use conventional arrays of structs.

Hints:  

1. Adapt the code from assignment 2 to either give access to or deny access to the menu

2. Write a simple switch-based menu routine which calls functions (see the lecture on switch)

3. Store the sample loan information in a text file.  

4. Define a struct to hold the applicant information

5. Define a struct to hold the loan information

6. Create two arrays of structs - one of type Applicant, and one of type Loan

7. Create an int which holds the number of applications in the arrays (int no_elements = 0)

8. To read in the applications from file, 

  • declare a Loan and an Applicant variable
  • write a function which reads the first loan information into the Applicant and Loan structs
  • Add these structs to the relevant arrays (at index no_elements) and increment the no_elements variable for the arrays by 1
  • repeat until all of the test data has been read into the arrays.

9. Write a function to display the list of applications. 

  • Use a for loop to change the index from 0 to the number of elements.:
  • Use the . syntax to access each member of each array element
  • i.e. printf(.... , applicant[i].firstName, applicant[i].surname...)
  • Each application should be numbered

10. Write a function to display the contents of a pair of loan and applicant structs (after prompting for the index).   

11. Write a delete function which 

  • calls the display function
  • prompts for the element to be deleted
  • deletes it (see slide on deleting things from an array - array lecture)

12. Write a function to create a new application - this should use code from assignment to populate a pair of empty Applicant and Loan structs

13. Write a function to write the contents of the two struct arrays back to the file in the same format they were read. 

14. Write a function which changes a password - prompts for a user name and password, and writes the name and hashed password to the end of the password file (use "a" in fopen).


Related Discussions:- Program for implementation of a data storage system

Pointers, one of the applications of computers in numerical analysis is com...

one of the applications of computers in numerical analysis is computing the area under a curve. one method of calculating the area under acurve is to divide the area int a number o

Ans, A palindrome is a string that reads the same from both the ends. Given...

A palindrome is a string that reads the same from both the ends. Given a string S convert it to a palindrome by doing character replacement. Your task is to convert S to palindrome

Define the recursion function in c, Define the Recursion Function in C? ...

Define the Recursion Function in C? In C, it is potential for the function to call themselves a function is describing 'recursive' if a statement within the body of a function

Curve, Write a program to find the area under the curve y = f(x) between x ...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

Change to palindrome, A palindrome is a string that reads the same from the...

A palindrome is a string that reads the same from the both the ends. Given a string S convert it to a palindrome by doing character replacement. Your takes is to convert S to palin

C++, write a c++ program for minimum shelf downloads

write a c++ program for minimum shelf downloads

For loop, write a c++ program for the sum of 10 numbers and print out the a...

write a c++ program for the sum of 10 numbers and print out the average

What are the differences among a struct in c & in c++?, A: In C++ a struct ...

A: In C++ a struct is alike to a class except for the default access specifier( refer to other question in the document). In C we ought to include the struct keyword while declarin

Rules of operator overloading, Rules of Operator Overloading It is ...

Rules of Operator Overloading It is a function defined to an operator with new term or meaning. It cannot produce new operator. It cannot modified the meaning of th

Stack, c++ program to to implement multiple stacks using single array

c++ program to to implement multiple stacks using single array

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd