Of course your code crashes. Let me tell you what is happening in it.
> char *m_pTextUser = "";
> char *m_pTextPass = "";
>
Here you initialize two strings to the value "". This means that both
strings already point to a string. This string is null-terminated, and
because the string is empty, the string is only one byte long and that
byte is zero.
> int nLena = m_pUser->GetTextLength() + 1;
> int nLenb = m_pPassword->GetTextLength() + 1;
>
Here you get the length of the username and the password and add one.
> m_pUser->SetText("terrorcell");
>
Here you copy the text "terrorcell" into the m_pUser entity, which then,
probably makes a local copy of "terrorcell".
> m_pUser->GetText(m_pTextUser, nLena);
> m_pPassword->GetText(m_pTextPass, nLenb);
>
And here is your crash. Remember that the strings that both m_pTextUser
and m_pTextPass point to, they are both 1 byte long. However, by calling
this command with nLena, is telling the command that the string is nLena
bytes long, while it only is 1 byte long. Now, the command tries to copy
the string into m_pTextUser, and copies more bytes into the string than
it can handle. The moment the program realizes that, the code crashes.
Instead you should either get a pointer to the username and the
password, or allocate a new string and copy the contents into that. So
what you should do instead is.
m_pUser->SetText("terrorcell");
// Allocate new strings
int nLena = m_pUser->GetTextLength() + 1;
int nLenb = m_pPassword->GetTextLength() + 1;
char *m_pTextUser = new char[nLena];
char *m_pTextPass = new char[nLenb];
// Copy the strings
m_pUser->GetText(m_pTextUser, nLena);
m_pPassword->GetText(m_pTextPass, nLenb);
// Display the strings.
Msg(m_pTextUser);
Msg(m_pTextPass);
// Do not forget to deallocate your new strings
// when you are done using them!
delete[] m_pTextUser;
delete[] m_pTextPass
That said, you should go get a C++ book and read about how pointers,
C-style strings and other basic C++ stuff works. It doesn't look like
you know what you are doing.
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