Functions, Math

Charles Linquist · Joined: 07 May 2005 Posts: 28 Location: Campbell, CA

I have taught myself enough to get some things working, but now I need functions. I'm trying to clear a keyboard buffer, and I have the following lines in my program

Clear_Keyboard_Buffer()
for (i=0;i<11;i++)
{Keyin_buffer[i] = 0;}
return;

I want to be able to issue the command "Clear_Keyboard_Buffer" and
have the program run off and do that.
Unfortunately, when I compile, I get the message "Undefined Identifier - Clear_Keyboard_Buffer".
What do I need to change in order to get this to do what I want?

Next question: I am accepting characters from the keyboard in an array, and I need to filter out certain characters, such as <CR> and <ESC>. In another (un-named) language, I would define my input as INT and would look for 0x0D, etc. When I wanted to display the characters, I would add 0x30 and display them. In C, is there a way to trap control characters such as <ENTER> and <ESC> using type 'char'? If not and I have to store the input as 'int', then how do I convert the type to 'char" in order to display what was typed?

Ttelmah · Guest