I would like to have a password field similar to scanf but without echoing what you typed in... So you can press backspace and redo a character if you know you messed up:
The best I have so far is this:
Any suggestions? I want it so that if you press backspace, it actually backspaces instead of adding another *...Code:for (x = 0; x <= 50; x++) { usrKey = getch(); if (isspace(usrKey)) { usrEntry[x] = '\0'; break; } else { usrEntry[x] = usrKey; putchar('*'); } }
Last edited by Explicit; 05-21-2004 at 07:03 PM.
how would you know you messed up if your input isn't echoed. seems to me you'd have to wait till you flushed the buffer and your password was processed.
anyway check the FAQ there are some answers there about password fields.
Warning: Opinions subject to change without notice
The C Library Reference Guide
Understand the fundamentals
Then have some more fun
Like say your entering a password to get into this forum, sometimes you might know that you pressed a wrong button, and backspace... With the code above, backspace just shows up as a *...
Just happened to look this up for another thread....
It should be easy to modify to suit your purposes.
http://cboard.cprogramming.com/showthread.php?t=35694
gg
That is C++, I havn't even learned all of C yet...
Skip that line then.Code:cout << endl << buffer << endl;
gg
he means the one closer to the bottom not the first oneCode:const int ESC = 27; const int BACKSPACE = 8; const int BUFFER_SIZE = 255; char buffer[BUFFER_SIZE]; int c,i=0; do { c = getch(); //accept this char if it's printable if (isprint(c)) { buffer[i++] = (char)c; putch(c); } //support for backspace functionality if ((c == BACKSPACE) && (i != 0)) { putch(c); //backspace putch(' '); //overwrite existing char putch(c); //backspace back into position i--; } } while((c != '\r') && (c != ESC) && (i < BUFFER_SIZE)); buffer[i] = '\0'; //did it work? /*of course one line comments are c99 but just ignore the next line*/ cout << endl << buffer << endl;
>>&& (i < BUFFER_SIZE)
>>buffer[i] = '\0';
Danger Will Robinson, Danger! Buffer overflow alert
Here's the FAQ entry that was mentioned earlier:
http://faq.cprogramming.com/cgi-bin/...&id=1043284392
When all else fails, read the instructions.
If you're posting code, use code tags: [code] /* insert code here */ [/code]
I don't want input without pressing enter - I want everything exactly like how scanf works, but printing * when you type, instead of echoing the char you typed!
scanf() can't do that, because it works on buffered IO. That's why I pointed you to that particular FAQ entry. Read it through, and you'll find a password example in there.Originally Posted by Explicit
[edit]
Doh!, sorry, I should've read your post properly, I see you're already part way there. Just ignore my ramblings.... it's late (poor excuse, I know)
When all else fails, read the instructions.
If you're posting code, use code tags: [code] /* insert code here */ [/code]
Actually, your password entry code is more like what I'm looking for than mine is! In mine, if you press backspace it takes it as a char, heh.
Your code works for me
Last edited by Explicit; 05-22-2004 at 09:11 PM.
