Hello everyone,
I am having some problem in reading the data inputted in a file correctly using linked lists. I think this might be because of having pointer next of type password class.
Thanks,
comwizz.
The code is posted below. You may directly see the section if (reply==3) as that is where the input from the file is not correctly read.

C++ Syntax (Toggle Plain Text)

#include<iostream.h>
#include<conio.h>
#include<string.h>
#include<stdlib.h>
#include<fstream.h>
class password
{
 char *name;
 int code;
 public:
 password *next;
 void getdata(char*,int);
 friend void display(password*);
 void showdata();
};
void password::getdata(char* n,int cod)
{
 name=new char[strlen(n)+1];
 code=cod;
 if(name!=0)
 strcpy(name,n);
}
void display(password* head)
{
 password* current=head;
 while(current->next!=NULL)
 {
  current->showdata();
  current=current->next;
 }
 if(current->next==NULL)
 {
  current->showdata();
 }
}
void password::showdata()
{
  cout<<"Name"<<":"<<name<<endl;
  cout<<"Code"<<":"<<code<<endl;
}
void main()
{
 clrscr();
 password *head;
 password *current=head;
 int i=1,j=1;
 int reply=0;
 char *file_name;
 cout<<"Enter the name of the file in which you want to write"<<endl;
 cin>>file_name;
 fstream fout;
 fout.open(file_name,ios::in|ios::out);
 while(1)
 {
  cout<<"Enter name and code no , press -1 to abort, 1 otherwise ,3 for displaying from the file"<<endl;
  cin>>reply;
  if(reply==-1)
  {
   display(head);
   getch();
   cout<<"Aborting.."<<endl;
   exit(1);
  }
  if(reply==2)
  break;
  if(reply==3)
  {
   break;
  }
  char *name;
  name=new char[50];
  cout<<"Enter name:"<<endl;
  cin>>name;
  int code;
  cout<<"Enter code"<<endl;
  cin>>code;
  if(i==1)
  {
   head=new password;
   head->getdata(name,code);
   head->next=NULL;
   head->showdata();
   i++;
   fout.write((char*)head,sizeof(head));
  }
  else
  {
   current->next=new password;
   current=current->next;
   current->getdata(name,code);
   fout.write((char*)current,sizeof(current));
   fout.read((char*)current,sizeof(current));
   current->next=NULL;
 }
}
 if(reply==3)
 {
  fout.close();
  cout<<"Enter the name of the file"<<endl;
  char *name;
  cin>>name;
  fout.open(name,ios::in);
  fout.seekg(0);
  while(fout)
  {
   password* counter=new password;
   fout.read((char*)counter,sizeof(counter));
   counter->showdata();
  }
 }
}

#include<iostream.h> #include<conio.h> #include<string.h> #include<stdlib.h> #include<fstream.h> class password { char *name; int code; public: password *next; void getdata(char*,int); friend void display(password*); void showdata(); }; void password::getdata(char* n,int cod) { name=new char[strlen(n)+1]; code=cod; if(name!=0) strcpy(name,n); } void display(password* head) { password* current=head; while(current->next!=NULL) { current->showdata(); current=current->next; } if(current->next==NULL) { current->showdata(); } } void password::showdata() { cout<<"Name"<<":"<<name<<endl; cout<<"Code"<<":"<<code<<endl; } void main() { clrscr(); password *head; password *current=head; int i=1,j=1; int reply=0; char *file_name; cout<<"Enter the name of the file in which you want to write"<<endl; cin>>file_name; fstream fout; fout.open(file_name,ios::in|ios::out); while(1) { cout<<"Enter name and code no , press -1 to abort, 1 otherwise ,3 for displaying from the file"<<endl; cin>>reply; if(reply==-1) { display(head); getch(); cout<<"Aborting.."<<endl; exit(1); } if(reply==2) break; if(reply==3) { break; } char *name; name=new char[50]; cout<<"Enter name:"<<endl; cin>>name; int code; cout<<"Enter code"<<endl; cin>>code; if(i==1) { head=new password; head->getdata(name,code); head->next=NULL; head->showdata(); i++; fout.write((char*)head,sizeof(head)); } else { current->next=new password; current=current->next; current->getdata(name,code); fout.write((char*)current,sizeof(current)); fout.read((char*)current,sizeof(current)); current->next=NULL; } } if(reply==3) { fout.close(); cout<<"Enter the name of the file"<<endl; char *name; cin>>name; fout.open(name,ios::in); fout.seekg(0); while(fout) { password* counter=new password; fout.read((char*)counter,sizeof(counter)); counter->showdata(); } } }