Employee Management System Source Code with C Language

Published October 18, 2021


In this series of C Projects Source code we are going to cover create Employee Management System with C language. With this Employee Management System we can manage the details of the employees working in a company or organization. You get the idea of this project as soon as you hear the name itself, file handling method is followed here to store the data in a specific file. 

Insert, Edit, and Delete file operations are used in this project, but the limitation of this project is that you can only list the data but cannot search for any data item in particular. You can include the searching techniques in c to modify this program if you have better knowledge. 

The source code is given in the button below the image, you can download and get an exact idea regarding this project.

This Projects contains below modules

  • Add Employee Details
  • Edit Employee details
  • Modify Employee
  • Delete Employee

 

C Projects Source code Emplyee Management System

 

The complete code for EMS is below

#include <stdio.h> ///for input output functions like printf, scanf
#include <stdlib.h>
#include <conio.h>
#include <windows.h> ///for windows related functions (not important)
#include <string.h>  ///string operations

/** List of Global Variable */
COORD coord = {0,0}; /// top-left corner of window

/**
    function : gotoxy
    @param input: x and y coordinates
    @param output: moves the cursor in specified position of console
*/
void gotoxy(int x,int y)
{
    coord.X = x;
    coord.Y = y;
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),coord);
}

/** Main function started */

int main()
{
    FILE *fp, *ft; /// file pointers
    char another, choice;

    /** structure that represent a employee */
    struct emp
    {
        char name[40]; ///name of employee
        int age; /// age of employee
        float bs; /// basic salary of employee
    };

    struct emp e; /// structure variable creation

    char empname[40]; /// string to store name of the employee

    long int recsize; /// size of each record of employee

    /** open the file in binary read and write mode
    * if the file EMP.DAT already exists then it open that file in read write mode
    * if the file doesn't exit it simply create a new copy
    */
    fp = fopen("EMP.DAT","rb+");
    if(fp == NULL)
    {
        fp = fopen("EMP.DAT","wb+");
        if(fp == NULL)
        {
            printf("Connot open file");
            exit(1);
        }
    }

    /// sizeo of each record i.e. size of structure variable e
    recsize = sizeof(e);

    /// infinite loop continues untile the break statement encounter
    while(1)
    {
        system("cls"); ///clear the console window
        gotoxy(30,10); /// move the cursor to postion 30, 10 from top-left corner
        printf("1. Add Record"); /// option for add record
        gotoxy(30,12);
        printf("2. List Records"); /// option for showing existing record
        gotoxy(30,14);
        printf("3. Modify Records"); /// option for editing record
        gotoxy(30,16);
        printf("4. Delete Records"); /// option for deleting record
        gotoxy(30,18);
        printf("5. Exit"); /// exit from the program
        gotoxy(30,20);
        printf("Your Choice: "); /// enter the choice 1, 2, 3, 4, 5
        fflush(stdin); /// flush the input buffer
        choice  = getche(); /// get the input from keyboard
        switch(choice)
        {
        case '1':  /// if user press 1
            system("cls");
            fseek(fp,0,SEEK_END); /// search the file and move cursor to end of the file
            /// here 0 indicates moving 0 distance from the end of the file

            another = 'y';
            while(another == 'y')  /// if user want to add another record
            {
                printf("\nEnter name: ");
                scanf("%s",e.name);
                printf("\nEnter age: ");
                scanf("%d", &e.age);
                printf("\nEnter basic salary: ");
                scanf("%f", &e.bs);

                fwrite(&e,recsize,1,fp); /// write the record in the file

                printf("\nAdd another record(y/n) ");
                fflush(stdin);
                another = getche();
            }
            break;
        case '2':
            system("cls");
            rewind(fp); ///this moves file cursor to start of the file
            while(fread(&e,recsize,1,fp)==1)  /// read the file and fetch the record one record per fetch
            {
                printf("\n%s %d %.2f",e.name,e.age,e.bs); /// print the name, age and basic salary
            }
            getch();
            break;

        case '3':  /// if user press 3 then do editing existing record
            system("cls");
            another = 'y';
            while(another == 'y')
            {
                printf("Enter the employee name to modify: ");
                scanf("%s", empname);
                rewind(fp);
                while(fread(&e,recsize,1,fp)==1)  /// fetch all record from file
                {
                    if(strcmp(e.name,empname) == 0)  ///if entered name matches with that in file
                    {
                        printf("\nEnter new name,age and bs: ");
                        scanf("%s%d%f",e.name,&e.age,&e.bs);
                        fseek(fp,-recsize,SEEK_CUR); /// move the cursor 1 step back from current position
                        fwrite(&e,recsize,1,fp); /// override the record
                        break;
                    }
                }
                printf("\nModify another record(y/n)");
                fflush(stdin);
                another = getche();
            }
            break;
        case '4':
            system("cls");
            another = 'y';
            while(another == 'y')
            {
                printf("\nEnter name of employee to delete: ");
                scanf("%s",empname);
                ft = fopen("Temp.dat","wb");  /// create a intermediate file for temporary storage
                rewind(fp); /// move record to starting of file
                while(fread(&e,recsize,1,fp) == 1)  /// read all records from file
                {
                    if(strcmp(e.name,empname) != 0)  /// if the entered record match
                    {
                        fwrite(&e,recsize,1,ft); /// move all records except the one that is to be deleted to temp file
                    }
                }
                fclose(fp);
                fclose(ft);
                remove("EMP.DAT"); /// remove the orginal file
                rename("Temp.dat","EMP.DAT"); /// rename the temp file to original file name
                fp = fopen("EMP.DAT", "rb+");
                printf("Delete another record(y/n)");
                fflush(stdin);
                another = getche();
            }
            break;
        case '5':
            fclose(fp);  /// close the file
            exit(0); /// exit from the program
        }
    }
    return 0;
}

 

EMS C Projects source code

 

Conclusion: In this C Projects source code series we create employee Management system(EMS). We can manage the details of the employees working in a company or organization. You get the idea of this project as soon as you hear the name itself, file handling method is followed here to store the data in a specific file


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