If I use scanf() to read standard single character input then ENTER is needed to read next character, in case of getchar() it echoes the input on screen, is there anything which takes input without ENTER being pressed repeatedly and doesn't echo the input?
No, there is no provision for this in the standard, so whatever you use will be non-standard.
Look up a C++ Reference and learn How To Ask Questions The Smart WayOriginally Posted by Bjarne Stroustrup (2000-10-14)
any non-standard method which you can suggest? all I get is "implicit declaration of function ‘getch: undefined reference to `getch'
collect2: error: ld returned 1 exit status’"
What compiler/IDE are you using? I'm assuming your OS is Windows (if not, let us know because this will effect the answers we give).
You can try opening "conio.h" and see if "getch()" is included in there. Some implementations define it slightly different, such as with a leading underscore: "_getch()"
You can also find OS-specific code through a simple web search - for instance, I found this through a quick search: An alternate to using getch() - C++ Forum
You might also consider using a library such as curses (pdcurses for Windows). This is especially good if you plan on doing other kinds of trickery with the console.
I am using linux & the compiler is gcc.
I like this one: while getch question
A good write up showing termios usage: Capturing keyboard input, one character at a time
gg
Well, you can pretty much discard all of the advice I gave then (except the curses option).
