Displays a character to the screen at the current cursor position.
call x"AF" using function-code
                 char 
               	 | Using call prototype (see Key) | Picture | |
|---|---|---|
| function-code | cblt-x1-compx | pic x comp-x. | 
| char | pic x | pic x | 
| function-code | Value 18 | 
| char | The character to be displayed. | 
None