C++ Login System help. Post: 302488129

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Top Forums Programming C++ Login System help. Post 302488129 by andylbh on Saturday 15th of January 2011 09:34:26 AM

01-15-2011

Registered User

C++ Login System help.

I'm new to C++.
I have a text file named idpw.txt which is storing id and password
e.g
admin password
account1 abc
john hello

Here's my code so far:

Code:

bool login()
{
 string user[10],password[10], user1, password1;
 ifstream myfile("idpw.txt");
 
 cout << "Please enter your username" << endl;
 cin >> user1;
 cout << "Please enter your password" << endl;
 cin >> password1;
 
 int i=0;
 int j=0;
 while (!myfile.eof())
 {
  myfile >> user[i] >> password[i];
  i++;
 }
 myfile.close();
 
 for (j=0; j<i; j++)
 {
  if (user1 == user[j] && password1 == password[j])
  {
   cout << "Successfully Login" << endl;
   return true;
  }
 }
}

I can login successfully, but here's the problem.
I want to do it in a sense that:
1) When username is correct, but password is wrong, error message will be : "Wrong Password"
2) When username is not in the list, error message will be : "No such user exist"
3) If a user typed in wrong password for 3 times, account will be locked.

Am I doing the login function right? The for loop for int j seems really wrong.
Is there a way to do this?

Thanks alot in advance.

andylbh

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LEARN ABOUT V7

login

LOGIN(1)						      General Commands Manual							  LOGIN(1)

NAME

       login  -  sign on

SYNOPSIS

       login [ username ]

DESCRIPTION

       The  login  command  is	used when a user initially signs on, or it may be used at any time to change from one user to another.	The latter
       case is the one summarized above and described here.  See `How to Get Started' for how to dial up initially.

       If login is invoked without an argument, it asks for a user name, and, if appropriate, a password.  Echoing is  turned  off  (if  possible)
       during the typing of the password, so it will not appear on the written record of the session.

       After  a  successful  login,  accounting files are updated and the user is informed of the existence of .mail and message-of-the-day files.
       Login initializes the user and group IDs and the working directory, then executes a command interpreter (usually sh(1)) according to speci-
       fications found in a password file.  Argument 0 of the command interpreter is `-sh.

       Login is recognized by sh(1) and executed directly (without forking).

FILES

       /etc/utmp      accounting
       /usr/adm/wtmp  accounting
       /usr/mail/*    mail
       /etc/motd      message-of-the-day
       /etc/passwd    password file

SEE ALSO

       init(8), newgrp(1), getty(8), mail(1), passwd(1), passwd(5)

DIAGNOSTICS

       `Login incorrect,' if the name or the password is bad.
       `No Shell', `cannot open password file', `no directory': consult a programming counselor.

																	  LOGIN(1)

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