arithmatic Post: 302700837

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Top Forums Shell Programming and Scripting arithmatic Post 302700837 by Ygor on Friday 14th of September 2012 09:42:51 AM

09-14-2012

Registered User

Oh I see the problem. $1 and $2 are local to functions but you are not passing parameters to the function. Perhaps define a and b outside of the functions, e.g...

Code:

$ cat sh.1
menu ()
{
echo "=============="
echo "Calculator"
echo "=============="
echo "1. Divide"
echo "2. Multiply and Subtract"
echo "3. Quit"
read choice
case $choice in
1) option1 ;;
2) option2 ;;
3) exit 0 ;;
*) echo "invalid option" ;;
esac
}

option1 ()
{
c=$(($a/$b))
echo "**********"
echo "****"$c"****"
echo "**********"
}
a=$1
b=$2
menu

$ sh sh.1 50 5
==============
Calculator
==============
1. Divide
2. Multiply and Subtract
3. Quit
1
**********
****10****
**********

$

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LEARN ABOUT SUNOS

echo

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 5.10							    5 Jun 2002							    echo(3XCURSES)