Bank Database application in C
This project was about creating a C application that can take, store, and modify user accounts of a bank through storing the information in a .txt file. Through a large menu interface, the user could specify if they wanted to add a new record to the database, print all records from the database, find a record with a specific account number, delete a specific record from the database, or quit the application. On startup, the database information would be automatically loaded in from a specific .txt file and on quit, the databse information would be automatically written to a specific .txt file.
My role in this project was its creation in its entirety. I implemented this application through the UH Unix interface in the Vim text editor program where I was responsible for 100% of the work.
In this project, I gained experience with the major operations of the C programming language as well as implementing a complete bank databse application that covers many aspects of C programming which includes but is not limited to dynamically allocating memory on the heap that mimics a linked list data structure.
Here is some example code of the findRecord function that I used in my application:
/*****************************************************************
//
// Function name: findRecord
//
// DESCRIPTION: Finds a user's record with the specified
// account number.
//
// Parameters: start (struct record *) : A pointer of struct
// record. Represents
// the start of the list
// of records.
// accountno (int) : This integer represents the
// account number of the record
// being searched for.
//
// Return values: 0 : Record was found successfully.
// -1 : Record could not be found.
//
****************************************************************/
int findRecord(struct record *start, int accountno)
{
/*Initialize a pointer to a record set to the start of the
heap list.*/
struct record *current = start;
/*Initialize integer variables "isFound" to determine if a
record has been found in the heap list and "result" to return
the integer output of the function, currently set to -1
(unsuccessful)*/
int isFound = 0;
int result = -1;
/*[DEBUG] mode information verification output.*/
if (debugmode)
{
printf("\n[DEBUG]: Function called: findRecord\n");
printf("[PARAMETER]: accountno, Value: %d\n\n", accountno);
}
/*While the end of the heap list has not been reached:*/
while (current != NULL)
{
/*if the accountno of the current record matches the
accountno being searched for,*/
if (current -> accountno == accountno)
{
/*Print the record information to the user, and set
the integer variables accordingly to let the function
know that the record as been found successfully.*/
printf("\nAccount Number: %d\n", current -> accountno);
printf("Name: %s\n", current -> name);
printf("Address: %s\n\n", current -> address);
isFound = 1;
result = 0;
}
/*Set the current record to the next record in the
heap list.*/
current = current -> next;
}
/*If the record was not found, notify the user.*/
if (!isFound)
{
printf("\nRecord not found with account number %d\n", accountno);
}
return result;
}
Notice how I love to provide long and descriptive comments on how my code works. I have always taken pride in explaining code thorughly to other people through commenting, and I plan to continue coding in this system for all future personal projects.