Source code :Creating a file that can store students information

/Creating a file to store Students Data/
/Please use Dev C++ IDE while compiling this program/
#include iostream
#include fstream
#include conio.h
using namespace std;
class student
{
private:
char name[60], add[40];
int cl,rn,id;
public:
void getdata()
{
cout<<"Enter Your ID: ";
cin>>id;
cout<<"Name: ";
cin>>name;
cout<<"Address: ";
cin>>add;
cout<<"Class: ";
cin>>cl;
cout<<"Roll No: ";
cin>>rn;
}
void display()
{
cout<<"ID: "<<id<<endl;
cout<<"Name: "<<name<<endl;
cout<<"Address: "<<add<<endl;
cout<<"Class: "<<cl<<endl;
cout<<"Roll No. : "<<rn<<endl;
}
int getid()
{
return id;
}
}s1;
void dsn()
{
cout<<"\n\t\t\t* ** **************************** ** \n";
cout<<"\t\t\t ** ****** WELCOME ****** ** \n";
cout<<"\t\t\t ** **************************** ** \n\n\n\n";
}
void modify()
{
student st;
fstream fio("Stu.dat",ios::in|ios::out|ios::binary);
if(!fio)
{
cout<<"File could not be open !! Press any Key...";
getch();
return;
}
int d;
long pos;
char flag2=0;
cout<<"\n\nEnter The ID To Be Modified: ";
cin>>d;
while(!fio.eof())
{
pos=fio.tellg();
fio.read((char)&st,sizeof(st));
if(st.getid()==d)
{
cout<<"\n\n\t\tEnter New Details: \n\n";
st.getdata();
}
fio.seekg(pos);
fio.write((char)&st,sizeof(st));
flag2=1;
break;
}
if(flag2==0)
{
cout<<"\nRecord Not Found !!!";
}
cout<<"\n\nRecord Modified\n\n";
fio.close();
cout<<"\n\nPress a Key: ";
getch();
}
void display_all()
{
student st;
ifstream inFile;
inFile.open("Stu.dat",ios::binary);
if(!inFile)
{
cout<<"File could not be open !! Press any Key...";
getch();
return;
}
system("cls");
cout<<"\n\t\t\t ** **************************** ** \n";
cout<<"\t\t\t ** * DISPLAY ALL RECORDS * ** \n";
cout<<"\t\t\t ** **************************** ** \n\n\n\n";
while(inFile.read((char ) &st, sizeof(student)))
{
st.display();
cout<<"\n\n====================================\n";
}
inFile.close();
cout<<"\n\nPress a Key: ";
getch();
}
int del_file()
{
ifstream f;
f.open("Stu.dat",ios::binary);
if(!f)
{
cout<<"File Not Found !!! Press any Key...";
getch();
f.close();
}
else
{
f.close();
remove("Stu.dat");
return 1;
}
}
void del_recd()
{
int rec;
student st;
ifstream f1("Stu.dat",ios::binary);
ofstream f2("temp.dat",ios::out | ios::binary );
if(!f1)
{
cout<<"File could not be open !! Press any Key...";
getch();
return;
}
cout<<"\n\nEnter The ID To Delete The Record: ";
cin>>rec;
cout<<endl;
while(f1.read((char)&st,sizeof(st)))
{
if(st.getid()!=rec)
{
st.display();
cout<<"\n\n====================================\n";
f2.write((char)&st,sizeof(st));
}
}
f1.close();
f2.close();
remove("Stu.dat");
rename("temp.dat","Stu.dat");
cout<<"\n\n\t\t\tRECORD DELETED !!!\n\n";
}
int main()
{
int ch,idno,found=0,src,op;
char ag;
fstream f1;
while(1)
{ // Begin while
system("cls");
dsn(); //Call To Function dsn();
cout<<"===========================\n";
cout<<"1. ENTER RECORD |\n";
cout<<"2. DISPLAY ALL RECORDS |\n";
cout<<"3. SEARCH RECORD |\n";
cout<<"4. MODIFY RECORD |\n";
cout<<"5. DELETE RECORD |\n";
cout<<"6. DELETE FILE |\n";
cout<<"7. EXIT |\n";
cout<<"===========================\n\n";
cout<<"\nEnter your choice: ";
cin>>ch;
switch(ch)
{ // Start switch
case 1:
{
system("cls");
cout<<"\n\t\t\t* ** **************************** ** \n";
cout<<"\t\t\t ** **** ENTER RECORDS **** ** \n";
cout<<"\t\t\t ** **************************** ** \n\n\n\n";
s1.getdata();
f1.open("Stu.dat",ios::app);
f1.write((char)&s1,sizeof(student));
f1.close();
cout<<"\n\n\t\t\tRecord Added With ID: "<<s1.getid();
cout<<"\n\nPress a Key: ";
getch();
break;
}
case 2:
{
display_all(); //Call To Function display_all();
break;
}
case 3:
{
student st;
ifstream inFile;
int n;
system("cls");
cout<<"\n\t\t\t* ** **************************** ** \n";
cout<<"\t\t\t ** **** SEARCH RECORDS **** ** \n";
cout<<"\t\t\t ** **************************** ** *\n\n\n\n";
cout<<"\n\n\tPlease Enter The ID number ";
cin>>n;
inFile.open("Stu.dat",ios::binary);
if(!inFile)
{
cout<<"File could not be open !! Press any Key...";
getch();
return (1);
}
int flag=0;
while(inFile.read((char ) &st, sizeof(student)))
{
if(st.getid()==n)
{
st.display();
flag=1;
}
}
inFile.close();
if(flag==0)
{
cout<<"\n\n Record doesnot exist";
}
cout<<"\n\nPress a Key: ";
getch();
break;
}
case 4:
{
system("cls");
cout<<"\n\t\t\t ** **************************** ** \n";
cout<<"\t\t\t ** * RECORD MODIFICATION * ** \n";
cout<<"\t\t\t ** **************************** ** \n\n\n\n";
modify(); //Call To Function modify();
break;
}
case 5:
{
system("cls");
cout<<"\n\t\t\t ** **************************** ** \n";
cout<<"\t\t\t ** *** DELETE RECORD *** ** \n";
cout<<"\t\t\t ** **************************** ** *\n\n\n\n";
del_recd(); //Call To Function del_recd();
cout<<"\n\nPress a Key: ";
getch();
break;
}
case 6:
{
int p;
p=del_file(); //Call To Function del_file();
if(p==1)
{
cout<<"\n\n\t\tThe File Stu.dat is Deleted";
cout<<"\n\n\tPress a Key: ";
getch();
}
break;
}
case 7:
{
system("cls");
cout<<"\n\n\n\t\t\tThank You !!!";
exit(1);
}
default:
system("cls");
cout<<"Enter a valid choice!";
cout<<"\n\nPress a Key To Go Back To The Main Menu: ";
getch();
} // End of switch
} // End of while
return 0;
}