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std::cin is used to get an input value (cin = character input) << is used with std::cout, and shows the direction that data is moving (if std::cout represents the console, the output data is moving from the variable to the console).
Cin With Member Functionsget(char &ch): Reads a character from the input and stores it in ch. cin. getline(char *buffer, int length): Reads a stream of characters into the string buffer, stopping when it reaches length-1 characters, an end-of-line character ('n'), or the file's end.
std::cin. Object of class istream that represents the standard input stream oriented to narrow characters (of type char ). It corresponds to the C stream stdin . The standard input stream is a source of characters determined by the environment.
Inputting a string You can use cin but the cin object will skip any leading white space (spaces, tabs, line breaks), then start reading when it comes to the first non-whitespace character and then stop reading when it comes to the next white space. In other words, it only reads in one word at a time.
@wrang-wrang answer was really good, but did not fulfill my needs, this is what my final code (which was based on this) look like:
#ifdef WIN32
#include <windows.h>
#else
#include <termios.h>
#include <unistd.h>
#endif
void SetStdinEcho(bool enable = true)
{
#ifdef WIN32
HANDLE hStdin = GetStdHandle(STD_INPUT_HANDLE);
DWORD mode;
GetConsoleMode(hStdin, &mode);
if( !enable )
mode &= ~ENABLE_ECHO_INPUT;
else
mode |= ENABLE_ECHO_INPUT;
SetConsoleMode(hStdin, mode );
#else
struct termios tty;
tcgetattr(STDIN_FILENO, &tty);
if( !enable )
tty.c_lflag &= ~ECHO;
else
tty.c_lflag |= ECHO;
(void) tcsetattr(STDIN_FILENO, TCSANOW, &tty);
#endif
}
Sample usage:
#include <iostream>
#include <string>
int main()
{
SetStdinEcho(false);
std::string password;
std::cin >> password;
SetStdinEcho(true);
std::cout << password << std::endl;
return 0;
}
There's nothing in the standard for this.
In unix, you could write some magic bytes depending on the terminal type.
Use getpasswd if it's available.
You can system() /usr/bin/stty -echo to disable echo, and /usr/bin/stty echo to enable it (again, on unix).
This guy explains how to do it without using "stty"; I didn't try it myself.
If you don't care about portability, you can use _getch() in VC.
#include <iostream>
#include <string>
#include <conio.h>
int main()
{
std::string password;
char ch;
const char ENTER = 13;
std::cout << "enter the password: ";
while((ch = _getch()) != ENTER)
{
password += ch;
std::cout << '*';
}
}
There is also getwch() for wide characters. My advice is that you use NCurse which is available in *nix systems also.
Only idea what i have, you could read password char by char, and after it just print backspace ("\b") and maybe '*'.
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