Employee management using File in C

Question

Write a program for Employee management using File handling in C. Get the records from the user and store that in file.

Note

fseek() – used to move pointer to specific position

fwrite() – used to write in file

fread() – used to read from the file

For further details refer this

Logic

• The logic is simple for employee management. Create a structure for the employee with details such as name, job, salary, id.
• Get the employee details from the user.
• Open the file in w+(both reading and writing) mode and write the structure into the file using fwrite.
• To read the details, move the cursor to the beginning of the file and read each employee details using fread.
• Then print the employee details. You can also use fscanf, fprintf as alternative of fread, fwrite.

Program

#include<stdio.h>
#include<stdlib.h>
int main()
{
    struct Emp
    {
        int id;
        char employeename[20];
        long int salary;
        char job[20];
    }e;
    int x;

    FILE* fptr;
    fptr = fopen("New.dat","w+"); //opening for both reading and writing
    if(fptr==NULL)
        printf("can't open file");

    char c;

    do
    {
        printf("1.Insert new employee detail");
        printf("\n\n2.Display all detail...");
        scanf("%d",&x);
        getchar();

        switch(x)
        {
        case 1:
                fseek(fptr,0,SEEK_END);  //move cursor to end of file

                printf("\nEnter employee name: ");
                gets(e.employeename);
                printf("\nEnter employee id:");
                scanf("%d",&e.id);
                getchar();
                printf("\nEnter salary: ");
                scanf("%d",&e.salary);
                getchar();
                printf("\nEnter job: ");
                gets(e.job);
                fwrite(&e, sizeof(struct Emp),1, fptr);
                break;
        case 2:

               fseek(fptr,0,SEEK_SET); //move cursor to the beginning of the file

                    while(fread(&e,sizeof(struct Emp),1,fptr))
                    {
                       
                        printf("%d  %s  %d %s\n",e.id,e.employeename,e.salary,e.job);
                    }
               break;

        default: printf("wrong choice");

        }

        printf("Do you want to continue (y/n)...");

        scanf("%c",&c);
    }while(c=='y');
    fclose(fptr);     //close the file
}

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