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

mlib_imagemoment2

mlib_ImageMoment2(3MLIB)				    mediaLib Library Functions					  mlib_ImageMoment2(3MLIB)

NAME

       mlib_ImageMoment2 - second moment

SYNOPSIS

       cc [ flag... ] file... -lmlib [ library... ]
       #include <mlib.h>

       mlib_status mlib_ImageMoment2(mlib_d64 *moment, const mlib_image *img);

DESCRIPTION

       The mlib_ImageMoment2() function computes the second moment of each channel in an image.

       It uses the following equation:

		     1	   w-1 h-1
       moment[i] = ----- * SUM SUM img[x][y][i]**2
		    w*h    x=0 y=0

PARAMETERS

       The function takes the following arguments:

       moment	       Pointer to moment array, where length is the number of channels in the image.

       img	       Pointer to an image.

RETURN VALUES

       The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_ImageMoment2_Fp(3MLIB), attributes(5)

SunOS 5.10							    10 Nov 2004 					  mlib_ImageMoment2(3MLIB)