An Employee Management Project.

#include <stdio.h>
typedef struct Employee
{
char fname[20];
char lname[20];
char sub_taken[20];
char last_edu[20];
char join_date[20];
int id;
int age;
float bsal;
}Employee;

int main(void)
{

int id;
FILE *fp,*ft;
char another,choice;
Employee emp;
char fname[20];
char lname[20];
long int recsize;

fp=fopen("EMP.DAT","rb+");
if(fp==NULL)
{
fp=fopen( "EMP.DAT","wb+");
if(fp==NULL)
{
printf("Can't Open File");
exit();
}
}
recsize=sizeof(emp);
while(1)
{
printf("1.Add Records \n2.Delete Records \n3.Modify Records \n4.List Records \n5.Exit");
printf("Enter your choice");
fflush(stdin);
scanf("%c",&choice);
switch(choice)
{
case'1':
fseek(fp,0,SEEK_END);
another='Y';
while(another=='Y'|| another=='y')
{
printf("Enter the first name,last name,age and basic salary : ");
scanf("%s %d %f",emp.fname,&emp.age,&emp.bsal);
printf(" Enter joining date,id,last education,subject taken");
scanf("%s %d %s %s",emp.join_date,&emp.id,emp.last_edu,
emp.sub_taken);
fwrite(&emp,recsize,1,fp);
printf(" Add another Record (Y/N): ");
fflush(stdin);
another=getchar();
}

break;
case '2':
another='Y';
while(another=='Y'|| another=='y')
{
printf(" Enter the id of the employee to be deleted : ");
scanf("%d",&id);
ft=fopen("TEMP.DAT","wb");
rewind(fp);
while(fread(&emp,recsize,1,fp)==1)
{
if(strcmp(emp.id,id)!=0)
fwrite(&emp,recsize,1,ft);
}
fclose(fp);
fclose(ft);
remove("EMP.DAT");
rename("TEMP.DAT","EMP.DAT");
fp=fopen("EMP.DAT","rb+");
printf("Delete another Record(Y/N): ");
fflush(stdin);
another=getchar();
}

break;
case '3':
another='Y';
while(another=='Y'|| another=='y')
{
printf(" Enter name of employee to modify : ");
scanf("%s",emp.fname);
rewind(fp);
while(fread(&emp,recsize,1,fp)==1)
{
if(strcmp(emp.id,id)==0)
{
printf(" Enter new fname,new lname,age,basic salary,joining_date,subject taken and last education : ");

scanf("%s%s%d%f%s%s%s",emp.fname,emp.lname,&emp.age,&emp.bsal,emp.join_date,emp.sub_taken,emp.last_edu);
fseek(fp,-recsize,SEEK_CUR);
fwrite(&emp,recsize,1,fp);
break;
}
}
printf("Want to Modify another record(Y/N): ");
fflush(stdin);
another=getchar();
}

break;

case '4':

rewind(fp);
while(fread(&emp,recsize,1,fp)==1)
/* printf("%s,%s %s %d",emp.fname,emp.lname,emp.age,emp.bsal,emp.join_date,emp.last_edu,emp.su);*/
break;
case '5':
fclose(fp);
exit();

}
}
}