Employee Record System in C

Software called Employee Record System is designed to take care of a business's main administrative tasks. Using ERS, businesses can keep track of every employee and their data. It is utilized to administer the business using an electronic system. This program was created to manage personnel records for any business. Keeping track of all personnel records in one place would assist businesses.

The Employee Record System's purpose is: The user will be given 5 choices:

Create a fresh record.
Removing a record
Change a record.
View every record.
Exit.

Employee Information:

Name.
Age.
Salary.
Employee ID.

Approach for the program

The application's name and the creator are listed in the first frame: It is made with a few printf commands and a system provided function (). The standard C/C++ library has the system() function. It is used to transmit commands that the operating system's command processor or terminal may execute, and it then returns the command after it has been finished. System("Color 3F") will alter the colour of the console's backdrop (3), as well as the foreground text on the console (F). The user will get a message since system("pause") will pause the screen: Press any key to proceed. The gotoxy() method Setting the coordinates of the presented data will be beneficial.

Program Breakdown

struct emp {
	char name [ 50 ] ;
	float salary ;
	int age ;
	int id ;
} ;

The above code will use to create the structure of the employee.

void gotoxy ( int x , int y )
{
	cord.X = x ;
	cord.Y = y ;
	SetConsoleCursorPosition (
		GetStdHandle ( STD_OUTPUT_HANDLE ) ,
		cord ) ;
}

FILE * fp , * ft ;

The above code will set the console cursor position.

void addrecord ( )
{
	system ( " cls " ) ;
	fseek ( fp , 0 , SEEK_END ) ;
	char another = ' y ' ;

	while ( another = = ' y ' ) {
		printf ( " \ n Enter Name : " ) ;
		scanf ( " % s " , e.name ) ;

		printf ( " \ nEnter Age : " ) ;
		scanf ( " % d " , & e.age ) ;

		printf ( " \ n Enter Salary : " ) ;
		scanf ( " % f " , & e.salary ) ;

		printf ( " \ n Enter EMP-ID : " ) ;
		scanf ( " % d " , & e.id ) ;

		fwrite ( & e , size , 1 , fp ) ;

		printf ( " \ n Want to add another "
			" record ( Y / N ) : " ) ;
		fflush ( stdin ) ;

		scanf ( " % c " , & another ) ;
	}
}

The above code will use to add the record.

void deleterecord ( )
{
	system ( " cls " ) ;
	char empname [ 50 ] ;
	char another = ' y ' ;

	while ( another = = ' y  ' ) {
		printf ( " \ n Enter employee "
			" name to delete : " ) ;
		scanf ( " % s " , empname ) ;

		ft = fopen ( " temp.txt " , " wb " ) ;
		rewind ( fp ) ;

		while ( fread ( & e , size ,
					1 , fp )
			= = 1 ) {
			if ( strcmp ( e.name ,
					empname )
				! = 0 )
				fwrite ( & e , size , 1 , ft ) ;
		}

		fclose ( fp ) ;
		fclose ( ft ) ;
		remove ( " data.txt " ) ; 
		rename ( " temp.txt " , " data.txt " ) ;
		fp = fopen ( " data.txt " , " rb + " ) ;

		printf ( " \ n Want to delete another "
			" record ( Y / N ) : " ) ;
		fflush ( stdin ) ;
		another = getche ( ) ;
	}
}

The above code is used to delete a record from the system.

void displayrecord ( )
{
	system ( " cls " ) ;

	// sets pointer to start
	// of the file
	rewind ( fp ) ;

	printf ( " \ n = = = = = = = = = = = = = = = = = = = = = = = = = "
		" = = = = = = = = = = = = = = = = = = = = = = = = = = = "
		" = = = = = = " ) ;
	printf ( " \ n NAME \ t \ t AGE \ t \ t SALARY\ t \ t "
		 " \ t I D \ n " ,
		e.name , e.age ,
		e.salary , e.id ) ;
	printf ( " = = = = = = = = = = = = = = = = = = = = = = = = = = = "
		" = = = = = = = = = = = = = = = = = = = = = = = = = = = "
		" = = = = \ n " ) ;
	while ( fread ( & e , size , 1 , fp ) = = 1 )
		printf ( " \ n % s \ t \ t % d \ t \ t%.2f \ t % 10d " ,
			e.name , e.age , e.salary , e.id ) ;

	printf ( " \ n \ n \ n \ t " ) ;
	system ( " pause " ) ;
}

The above code will use to display records.

void modifyrecord ( )
{
	system ( " cls " ) ;
	char empname [ 50 ] ;
	char another = ' y ' ;

	while ( another = = ' y ' ) {
		printf ( " \ n Enter employee name "
			" to modify : " ) ;
		scanf ( " % s " , empname ) ;

		rewind ( fp ) ;

		// While File is open
		while ( fread ( & e , size , 1 , fp ) = = 1 ) {
			// Compare the employee name
			// with ename
			if ( strcmp ( e.name , empname ) = = 0 ) {
				printf ( " \ n Enter new name : " ) ;
				scanf ( " % s " , e.name ) ;
				printf ( " \ n Enter new age : " ) ;
				scanf ( " % d " , & e.age ) ;
				printf ( " \ n Enter new salary : " ) ;
				scanf ( " % f " , & e.salary ) ;
				printf ( " \ n Enter new EMP-ID : " ) ;
				scanf ( " % d " , & e.id ) ;

				fseek ( fp , -size , SEEK_CUR ) ;
				fwrite ( & e , size , 1 , fp ) ;
				break ;
			}
		}

		// Ask for modifying another record
		printf ( " \ n Want to modify another "
			" record ( Y / N ) : " ) ;
		fflush ( stdin ) ;
		scanf ( " % c " , & another ) ;
	}
}

The above code will use to modify the existing record in the system.

Program for Employee Record System in C

// C program for the above approach
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>

// Structure of the employee
struct emp {
	char name[50];
	float salary;
	int age;
	int id;
};
struct emp e;

// size of the structure
long int size = sizeof(e);

// In the start coordinates
// will be 0, 0
COORD cord = { 0, 0 };

// function to set the
// coordinates
void gotoxy(int x, int y)
{
	cord.X = x;
	cord.Y = y;
	SetConsoleCursorPosition(
		GetStdHandle(STD_OUTPUT_HANDLE),
		cord);
}

FILE *fp, *ft;

// Function to add the records
void addrecord()
{
	system("cls");
	fseek(fp, 0, SEEK_END);
	char another = 'y';

	while (another == 'y') {
		printf("\nEnter Name : ");
		scanf("%s", e.name);

		printf("\nEnter Age : ");
		scanf("%d", &e.age);

		printf("\nEnter Salary : ");
		scanf("%f", &e.salary);

		printf("\nEnter EMP-ID : ");
		scanf("%d", &e.id);

		fwrite(&e, size, 1, fp);

		printf("\nWant to add another"
			" record (Y/N) : ");
		fflush(stdin);

		scanf("%c", &another);
	}
}

// Function to delete the records
void deleterecord()
{
	system("cls");
	char empname[50];
	char another = 'y';

	while (another == 'y') {
		printf("\nEnter employee "
			"name to delete : ");
		scanf("%s", empname);

		ft = fopen("temp.txt", "wb");
		rewind(fp);

		while (fread(&e, size,
					1, fp)
			== 1) {
			if (strcmp(e.name,
					empname)
				!= 0)
				fwrite(&e, size, 1, ft);
		}

		fclose(fp);
		fclose(ft);
		remove("data.txt");
		rename("temp.txt", "data.txt");
		fp = fopen("data.txt", "rb+");

		printf("\nWant to delete another"
			" record (Y/N) :");
		fflush(stdin);
		another = getche();
	}
}

// Function to display the record
void displayrecord()
{
	system("cls");

	// sets pointer to start
	// of the file
	rewind(fp);

	printf("\n= = = = = = = = = = = = = = = = = = = = = = = = ="
		"= = = = = = = = = = = = = = = = = = = = = = = = = = ="
		"= = = = = =");
	printf("\nNAME\t\tAGE\t\tSALARY\t\t"
		"\tID\n",
		e.name, e.age,
		e.salary, e.id);
	printf("= = = = = = = = = = = = = = = = = = = = = = = = = = ="
		"= = = = = = = = = = = = = = = = = = = = = = = = = = ="
		"= = = =\n");
	while (fread(&e, size, 1, fp) == 1)
		printf("\n%s\t\t%d\t\t%.2f\t%10d",
			e.name, e.age, e.salary, e.id);

	printf("\n\n\n\t");
	system("pause");
}

// Function to modify the record
void modifyrecord()
{
	system("cls");
	char empname[50];
	char another = 'y';

	while (another == 'y') {
		printf("\nEnter employee name"
			" to modify : ");
		scanf("%s", empname);

		rewind(fp);

		// While File is open
		while (fread(&e, size, 1, fp) == 1) {
			// Compare the employee name
			// with ename
			if (strcmp(e.name, empname) == 0) {
				printf("\nEnter new name:");
				scanf("%s", e.name);
				printf("\nEnter new age :");
				scanf("%d", &e.age);
				printf("\nEnter new salary :");
				scanf("%f", &e.salary);
				printf("\nEnter new EMP-ID :");
				scanf("%d", &e.id);

				fseek(fp, -size, SEEK_CUR);
				fwrite(&e, size, 1, fp);
				break;
			}
		}

		// Ask for modifying another record
		printf("\nWant to modify another"
			" record (Y/N) :");
		fflush(stdin);
		scanf("%c", &another);
	}
}

// Driver code
int main()
{
	int choice;

	// opening the file
	fp = fopen("data.txt", "rb+");

	// showing error if file is
	// unable to open.
	if (fp == NULL) {
		fp = fopen("data.txt", "wb+");
		if (fp == NULL) {
			printf("\nCannot open file...");
			exit(1);
		}
	}

	system("Color 3F");
	printf("\n\n\n\n\t\t\t\t============="
		"============================="
		"===========");
	printf("\n\t\t\t\t~~~~~~~~~~~~~~~~~~~"
		"~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
		"~~~~~");
	printf("\n\t\t\t\t==================="
		"============================="
		"=====");
	printf("\n\t\t\t\t[|:::>:::>:::>::> "
		"EMPLOYEE RECORD <::<:::<:::"
		"<:::|]\t");
	printf("\n\t\t\t\t==================="
		"============================="
		"=====");
	printf("\n\t\t\t\t~~~~~~~~~~~~~~~~~~~~"
		"~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
		"~~~");
	printf("\n\t\t\t\t====================="
		"==============================\n");
	system("pause");

	while (1) {
		// Clearing console and asking the
		// user for input
		system("cls");
		gotoxy(30, 10);
		printf("\n1. ADD RECORD\n");
		gotoxy(30, 12);
		printf("\n2. DELETE RECORD\n");
		gotoxy(30, 14);
		printf("\n3. DISPLAY RECORDS\n");
		gotoxy(30, 16);
		printf("\n4. MODIFY RECORD\n");
		gotoxy(30, 18);
		printf("\n5. EXIT\n");
		gotoxy(30, 20);
		printf("\nENTER YOUR CHOICE...\n");
		fflush(stdin);
		scanf("%d", &choice);

		// Switch Case
		switch (choice) {
		case 1:

			// Add the records
			addrecord();
			break;

		case 2:

			// Delete the records
			deleterecord();
			break;

		case 3:

			// Display the records
			displayrecord();
			break;

		case 4:

			// Modify the records
			modifyrecord();
			break;

		case 5:
			fclose(fp);
			exit(0);
			break;

		default:
			printf("\nINVALID CHOICE...\n");
		}
	}

	return 0;
}

Output:

         = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 
         ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
         = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
         [|:::>:::>:::>::> EMPLOYEE RECORD <::<:::<:::<:::|]       
         =====================================================     
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~     
         ===================================================
1. ADD RECORD

2. DELETE RECORD
                                                                                                
3. DISPLAY RECORDS                                                                              
                                                                                                
4. MODIFY RECORD                                                                                
                                                                                                
5. EXIT                                                                                         
                                                                                                
ENTER YOUR CHOICE...
1
Enter Name : Ravi

Enter Age : 26

Enter Salary : 120000

Enter EMP-ID : [email protected]

Want to add another record (Y/N) : Y
Enter Name : Shreya

Enter Age : 24

Enter Salary : 120000 

Enter EMP-ID : [email protected]

Want to add another record (Y/N) : N  
1. ADD RECORD

2. DELETE RECORD
                                                                                                
3. DISPLAY RECORDS                                                                              
                                                                                                
4. MODIFY RECORD                                                                                
                                                                                                
5. EXIT                                                                                         
                                                                                                
ENTER YOUR CHOICE...                                                                            
3
==========================================================
NAME            AGE             SALARY                  ID
==========================================================

Ravi            26              120000.00                0
Ravi            26              120000.00                0
Shreya          24              120000.00                0

        Press any key to continue . . .
Enter employee name to delete : Ravi

Want to delete another record (Y/N) : N
4
Enter employee name to modify : Ravi

Enter new name:Ravi

Enter new age :25

Enter new salary :125000

Enter new EMP-ID: [email protected]

Enter employee name to delete : Ravi

Want to delete another record (Y/N) :Y
Enter employee name to delete : Ravi

Want to delete another record (Y/N) : N

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