SIGN-UP/LOG-IN: "enter password" gets erased

WywrdAF (10)
Hi, I have another problem I'm hoping someone could help me with. We were tasked to make a sign-up program where only the password has the validation: atleast 1 uppercase, lowercase and 6-10 characters.
I used the \b char. But when I backspace my password, even the "enter password" gets erased even though it's in an outside function..

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#include <iostream>
#include <conio.h>
#include <string>
#include <cstdlib>
using namespace std;


string pw()
{ string pass,length;
int cnt;
char z;
    cout << " enter  password: ";
    pass="";
while (z!=13)
    {
        z=getch();
        pass+=z;
 if (z==8)
        {
           cout<<'\b'<<" "<<'\b';
           if (pass.length()<0)
           {
               continue;
           }
        }
 else if (z==13)
 {
     break;
     cin.ignore();

 }
        else{cout<<"*";}

    }


    return pass;
}

string b()
{string logpass;
    char w;
    cout << "Enter password: ";
logpass="";
    while (w!=13)
    {
        w=getch();
        logpass+=w;
 if (w==8)
        {
           cout<<'\b'<<" "<<'\b';
        }
  else if (w==13)
 {
     break;
     cin.ignore();

}        else{cout<<"*";}

    }

    cout<<endl;
return logpass;

}

int main ()
{
    string user,password, x,y,count;
    char p;
    int length,acc=1,hasup,haslow,hasalpha;
    int ctr = 0;

    cout<<"You must first create an account"<<endl;
    system("pause");
    system("cls");

while (acc!=0)
{

    cout<<"SIGN-UP FOR AN ACCOUNT"<<endl;
    cout << "Enter username: ";
   getline(cin,x);
    y=pw();
    length=y.length()-1;
//cout<<length;

         if (length>=6&&length<=10)
        {  char v[length];
        int i;

            for (int i = 0; i < length; i++)
            { v[i]=y[i];

            }
            hasup=0;
            haslow=0;
            hasalpha=0;

            for (int i = 0; i < length and v[i]; i++)
            {if (isupper(v[i]))
            {hasup=1;}
            else if (islower(v[i]))
            {haslow=1;}
            if (isalpha(v[i]))
                {hasalpha=1;}
            }
            }if (haslow==1 && hasup==1 &&hasalpha==1)
            {

                    cout<< "Sign in successful!"<<endl;
                acc=0;
                system("pause");
                system("cls");
            }
            else
            {
                 cout<<"Password should have at least 1 uppercase and lowercase letter, 1 digit and 6 to 10 characters."<<endl;
        system("pause");
        system("cls");
            }
        }



string cun,logpass,z;
    while (cun!=x && z!=y)
    {
        cout<<"LOG IN TO YOUR ACCOUNT"<<endl;
        cout<<"Enter username: ";
        getline(cin,cun);
        z=b();
        if (cun!=x ||z!=y)
        {
            cout<<"Invalid username or password"<<endl;
            system("pause");
            system("cls");
        }
        else{
            continue;
        }
    }

        cout<<"WELCOME TO CEA"<<endl<<"You are now logged in! "<<endl<<"ENJOY YOUR FREE STAY"<<endl;
         system("pause");
        system("cls");

    return 0;
}




Last edited on
salem c (3715)
Please edit your post to include code tags.
http://www.cplusplus.com/articles/jEywvCM9/
WywrdAF (10)
I'm sorry, I've edited it now :)
lastchance (6980)
@WywrdAD,

I can't reproduce your problem. Explain what input is causing difficulties.

Please take a look at your post: do you seriously think that its indentation is meaningful?


You haven't initialised char z, and I can't believe that these lines ever do anything except take up screen space:
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           if (pass.length()<0)
           {
               continue;
           }
Last edited on
WywrdAF (10)
I think that is where the problem is.

if (pass.length()<0)
{
continue;
}

I meant to limit the ability of the backspace to continue when there is no password to erase. But when I press backspace when it asks me for a password, even the words " enter password: " gets backspaced.

lastchance (6980)
I can't see how pass.length()<0 would ever be true, so I suspect those lines do precisely nothing.

When I pressed backspace it backspaced one character. So, I simply can't reproduce what you are claiming.
WywrdAF (10)
Oh i get it now, I'm sorry. My wording should be: But when I continually press backspace after inputting a char/ password, even the words " enter password: " gets backspaced.
lastchance (6980)
Well, only allow it to backspace if pass.length() is strictly greater than 0.
WywrdAF (10)
Like this? Still won't work

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 if (z==8)
        {
           if (pass.length()>0)
           {
              cout<<'\b'<<" "<<'\b';
           }
          
        }
lastchance (6980)
Yes, well you have back-spaced on the screen ... but you haven't deleted the characters in your password!
WywrdAF (10)
Oh! Thank you for that! But how can I avoid backspacing on the screen as well? i tried putting a cout<<"enter password: " in the else block but no dice :( I'm sorry, I am really slow.
lastchance (6980)
Your method will probably work IF you match pass.length() with the number of asterisks on the screen. However, unless you delete the end characters from pass at the same time as back-spacing then this will not be the case.

I can see some backspacing, but I see nothing in any of your code samples that is deleting chars from the back of pass.
Last edited on
WywrdAF (10)
You're right! I just added a counter for the characters and it worked. Thank you so much!
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