pass.cpp

#include <bits/stdc++.h>
#include <windows.h>


string getpass(const char *prompt, bool show_asterisk=true)
{
  const char BACKSPACE=8;
  const char RETURN=13;

  string password;
  unsigned char ch=0;

  cout <<prompt<<endl;

  DWORD con_mode;
  DWORD dwRead;

  HANDLE hIn=GetStdHandle(STD_INPUT_HANDLE);

  GetConsoleMode( hIn, &con_mode );
  SetConsoleMode( hIn, con_mode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT) );

  while(ReadConsoleA( hIn, &ch, 1, &dwRead, NULL) && ch !=RETURN)
    {
       if(ch==BACKSPACE)
         {
            if(password.length()!=0)
              {
                 if(show_asterisk)
                     cout <<"\b \b";
                 password.resize(password.length()-1);
              }
         }
       else
         {
             password+=ch;
             if(show_asterisk)
                 cout <<'*';
         }
    }
  cout <<endl;
  return password;
}