I am currently working on a small program which involves the user entering
a number which will be used in a small mathematical calculation. However, I
do
NOT want the user to be able to type a letter or punctuation character. Such
characters should be ingnored and not echoed to the screen.

The problem is that I am unable to make this work. In simple terms:

  1. User enters digits until (Enter) key is pressed.
  2. If letter or punctuation, ignore, supress, wait for another digit.
  3. If digit, echo to screen and store in a variable.
  4. When (Enter) pressed, perform calculation on integer variable.

I have been trying to do this using a combination of loops and getch() (plus
variant) functions, but to no avail. Does anyone have any ideas? I know this
seems like a simple, mundane task, but I haven't touched C fr a while, and I
am a tad hazy with C at the moment. Any help would be appreciated.

Note: no code snippet because I changed it umpteen times before deleting it!

Johnno (japp{at}mpx.com.au)

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