How do I delimit a single character with scanf?

Code:

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#include <stdio.h>
int main{
char move;
scanf ("%c",&move");
switch (move)
case w: {y-move +=1; movechar();break;}
case a: {x-move -=1; movechar();break;}
case s: {y-move -=1; movechar();break;}
case d: {x-move +=1; movechar();break;}
return 0;
}

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Sorry, it's my first time here as a member but i've been using this site to selfteach C programming. Not sure if I posted the thread right but if I did make a mistake to the post please correct me.

Im making a small game where it requires movement of a piece with (w,a,s,d) keys.
I've read about delimiters in strings, where you can use it to stop scanning when a certain key is pressed.

here's my question.
how do I do that same operation with the line 4(scanf): if w,a,s, or d is pressed immediately enter the following key. (without physically pressing enter everytime. the key is immediately registered and moves on to the next line)

Try using getchar() instead of scanf

> (without physically pressing enter everytime. the key is immediately registered and moves on to the next line)
Non-blocking input is very specific to your OS/Compiler.
FAQ > How can I get input without having the user hit [Enter]? - Cprogramming.com

Does your compiler have the header conio.h?

If so, use the getch function from it.

Quote:

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Originally Posted by Salem

> (without physically pressing enter everytime. the key is immediately registered and moves on to the next line)
Non-blocking input is very specific to your OS/Compiler.
FAQ > How can I get input without having the user hit [Enter]? - Cprogramming.com

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Ah thanks for the link. Did not find that faq i guess i was searching incorrectly.
So with scanf, Its impossible. Ill try with getch

I can see a few errors with the code you've posted.
- Your definition for main lacks a parameter list.
- You have a double quote after the '&move' expression.
- Unless w, a, s, and d are #defined or members of an enum, you're not using a constant for each case statement.
- You're using the '-' character for the identifiers x-move and y-move.

Another thing you might look out for is declaring identifiers with file scope. In most cases it's better to design 'movechar' so that it uses a list of parameters instead of file-scoped variables.

As for receiving unbuffered input from a terminal, you could try reading the documentation for your terminal. I suggest writing programs that work well regardless of what stdin device stdin is connected to. If you need to write interactive programs, you might consider using a library like SDL or *curses, although it's usually better to get a good grasp of standard C before learning to use such libraries.

It might also be worth mentioning ncurses, you can read chapter 7 of the tutorial: Input functions

So in your program, you could do something like:


#include <ncurses.h>


initscr();
cbreak();


^to initialize, and once it's initialized, to read a character you can run:


int ch; ch = getch();


nCurses is one of my favorite libraries.