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Full Discussion: Doing simple math for children.
Top Forums Shell Programming and Scripting Doing simple math for children. Post 302517969 by devrymike on Thursday 28th of April 2011 10:49:51 AM
Old 04-28-2011
You're creating an infinite loop with this. Once it's wrong, it never exits because you never get a new value.

Code:
 
while (( $antwoordleerling != $antwoordjuiste ))
do
echo "Fout! Probeer het nogmaals $getallinks x $getalrechts =" 
read $getallinks x $getalrechts

I think this should fix it and work to your liking.

Code:
 
#!/bin/bash
while true
do
getallinks=$((RANDOM/(32767/10)+1))
getalrechts=$((RANDOM/(32767/10)+1))
echo "Hoeveel is $getallinks x $getalrechts ?"
read antwoordleerling
antwoordjuiste=$((getallinks*getalrechts))
if test  $antwoordleerling == $antwoordjuiste 
then
echo "Goed zo! $getallinks x $getalrechts is inderdaad $antwoordjuiste."
else
while (( $antwoordleerling != $antwoordjuiste ))
do
echo "Fout! Probeer het nogmaals $getallinks x $getalrechts =" 
read antwoordleerling
done
fi
done

 

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LEARN ABOUT OPENSOLARIS

noecho

echo(3XCURSES)						  X/Open Curses Library Functions					    echo(3XCURSES)

NAME

       echo, noecho - enable/disable terminal echo

SYNOPSIS

       cc [ flag... ] file... -I /usr/xpg4/include  -L	/usr/xpg4/lib 
	-R  /usr/xpg4/lib  -lcurses  [ library... ]

       c89 [ flag... ] file... -lcurses [ library... ]

       #include <curses.h>

       int echo(void);

       int noecho(void);

DESCRIPTION

       The  echo()  function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially,
       curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control  soft-
       ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined.

RETURN VALUES

       Upon successful completion, these functions return OK. Otherwise, they return ERR.

ERRORS

       No errors are defined.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5)

SunOS 5.11							    5 Jun 2002							    echo(3XCURSES)
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