Jan
23
#include<stdio.h>
#include<conio.h>
#include<ctype.h>
struct emp_record{
int eno;
char ename[20];
float bpay;
}erec;
FILE *efile;
//———————————————-
void main(){
void createfile(void);
void readfile(void);
void appendrec(void);
void modirec(void);
void deleterec(void);
int n;
do
{
printf(“\n\t Main Menu”);
printf(“\n\t Press 1 – file creation”);
printf(“\n\t Press 2 – reading”);
printf(“\n\t Press 3 – appending”);
printf(“\n\t Press 4 – modify a record”);
printf(“\n\t Press 5 – delete a record”);
printf(“\n\t Press 6 – quit”);
printf(“\n\n Enter your choice: “);
scanf(“%d”,&n);
switch(n){
case 1: createfile();
break;
case 2: readfile();
break;
case 3: appendrec();
break;
case 4: modirec();
break;
case 5: deleterec();
break;
case 6: exit(0);
break;
}
}while(n != 6);
}
//———END MAIN————————-
//—————- file creation ————–
void createfile(void){
char choice=’y’;
efile=fopen(“employ.dat”,”w”);
fflush(stdin);
while(toupper(choice)==’Y’){
printf(“\n Enter the employee No: “);
scanf(“%d”,&erec.eno);
printf(“\n Enter the employee Name: “);
scanf(“%s”,erec.ename);
printf(“\n Enter the employee Basic Pay: “);
scanf(“%f”,&erec.bpay);
fwrite(&erec,sizeof(erec),1,efile);
printf(“\n Press y – to continue “);
printf(“\n Any other key to stop. “);
choice=getche();
}
fclose(efile);
}
//————————————————–
//—————- Read file ———————–
void readfile(void){
efile=fopen(“employ.dat”,”r”);
printf(“\n—————————————–“);
printf(“\nEmp No. Employee Name Basic Pay”);
printf(“\n—————————————–“);
fread(&erec,sizeof(erec),1,efile);
while(!feof(efile))
{
printf(“\n %d \t %-20s %-0.2f”,erec.eno,erec.ename,erec.bpay);
fread(&erec,sizeof(erec),1,efile);
}
printf(“\n—————————————–\n”);
fclose(efile);
printf(“\n Press ant key to continue …”);
getch();
}
//——————————————————
//————— Append records ———————–
void appendrec(void){
char choice=’y’;
efile=fopen(“employ.dat”,”a”);
fflush(stdin);
while(toupper(choice)==’Y’){
printf(“\n Enter the employee No: “);
scanf(“%d”,&erec.eno);
printf(“\n Enter the employee Name: “);
scanf(“%s”,erec.ename);
printf(“\n Enter the employee Basic Pay: “);
scanf(“%f”,&erec.bpay);
fwrite(&erec,sizeof(erec),1,efile);
printf(“\n Press y – to continue “);
printf(“\n Any other key to stop. “);
choice=getche();
}
fclose(efile);
}
//——————————————————
//—————- Modify Record ———————–
void modirec(void){
int temp,flag=0,n;
efile=fopen(“employ.dat”,”r+”);
fflush(stdin);
printf(“\n To modify a record”);
printf(“————————“);
printf(“\n Enter the Roll No.”);
scanf(“%d”,&temp);
rewind(efile);
fread(&erec,sizeof(erec),1,efile);
while(!feof(efile) && flag==0){
if(erec.eno==temp)
{
printf(“\n Existing record details “);
printf(“\n %d \t %-20s %-0.2f”,erec.eno,erec.ename,erec.bpay);
fflush(stdin);
printf(“\n\n Enter the modified details “);
printf(“\n——————————–“);
printf(“\n Enter the employee No: “);
scanf(“%d”,&erec.eno);
printf(“\n Enter the employee Name: “);
scanf(“%s”,erec.ename);
printf(“\n Enter the employee Basic Pay: “);
scanf(“%f”,&erec.bpay);
n=sizeof(erec);
fseek(efile,-n,SEEK_CUR);
fwrite(&erec,n,1,efile);
flag=1;
printf(“\n The record has been modified!”);
}
fread(&erec,sizeof(erec),1,efile);
}
fclose(efile);
if(flag==0)
printf(“\n The given record is not present in the file!!!”);
printf(“\n\t press any key to continue … “);
getch();
}
//————————————————
//————– Delete Record ——————-
void deleterec(void){
int temp,flag=0;
FILE *tfile;
efile=fopen(“employ.dat”,”r”);
tfile=fopen(“temp.dat”,”w”);
printf(“\n To delete a record “);
printf(“\n———————“);
printf(“\n Enter the Roll No. “);
fflush(stdin);
scanf(“%d”,&temp);
fread(&erec,sizeof(erec),1,efile);
while(!feof(efile))
{
if(erec.eno == temp)
{
printf(“\n The given record “);
printf(“\n %d \t %-20s %-0.2f”,erec.eno,erec.ename,erec.bpay);
printf(“\n is deleted !!!”);
flag = 1;
}
else{
fwrite(&erec,sizeof(erec),1,tfile);
}
fread(&erec,sizeof(erec),1,efile);
}
fclose(tfile);
fclose(efile);
remove(“employ.dat”);
rename(“temp.dat”,”employ.dat”);
if(flag == 0)
printf(“\n The given record is not present in thr file!!!”);
printf(“\n\t press any key to continue”);
getch();
}
//————————————————