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Case structure

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# 1  
Old 06-08-2007
Case structure
Hi,

Can anyone help me with the following case structure?

Code:
echo "Please enter the date for which you want the Report:\c"
read dat
d1=`echo $dat|cut -c7-8`
m1=`echo $dat|cut -c5-6`
y1=`echo $dat|cut -c1-4`

yr=`expr "$d1" - 1`
case "$yr" in
        0)
           MONTH=`expr "$m1" - 1`
           YEAR=y1
           ;;
                case "$m1" in
                        0)
                           MONTH=12
                           YEAR=`expr "$y1" - 1`
                        ;;
                esac
        DAY=`cal $MONTH $YEAR |grep . | fmt -1 | tail -1`
esac

It returns me an error:

`"$m1"' is not expected

Thanks for your help
kamitsin
# 2  
Old 06-08-2007
Why do you need case? Use if
Code:
echo "Please enter the date for which you want the Report:\c"
read dat
d1=`echo $dat|cut -c7-8`
m1=`echo $dat|cut -c5-6`
y1=`echo $dat|cut -c1-4`

yr=`expr "$d1" - 1`
if [ $yr -eq 0 ]; then
           MONTH=`expr "$m1" - 1`
           YEAR=y1
elif [ $m1 -eq 0 ]; then
            MONTH=12
            YEAR=`expr "$y1" - 1`
fi
DAY=`cal $MONTH $YEAR |grep . | fmt -1 | tail -1`

# 3  
Old 06-08-2007
Thanks, i did use if in the end but i want to know that what is wrong with this case structure Smilie.
kamitsin
# 4  
Old 06-08-2007
Quote:
Originally Posted by kamitsin
Thanks, i did use if in the end but i want to know that what is wrong with this case structure Smilie.
Your syntax is not correct.
Code:
case $var in
expr)
    ...    
    ;;

expr1)  
    ...    
    ;;

*)
    ...    
esac

You have following code without any condition
Code:
  case "$m1" in
                        0)
                           MONTH=12
                           YEAR=`expr "$y1" - 1`
                        ;;
                esac
        DAY=`cal $MONTH $YEAR |grep . | fmt -1 | tail -1`

You can use this
Code:
case "$yr" in
        0)
           MONTH=`expr "$m1" - 1`
           YEAR=y1
           ;;
        *)      case "$m1" in
                        0)
                           MONTH=12
                           YEAR=`expr "$y1" - 1`
                        ;;
                esac
           ;;
esac
DAY=`cal $MONTH $YEAR |grep . | fmt -1 | tail -1`

# 5  
Old 06-08-2007
A small mistake and it made all the difference.

Code:
echo "Please enter the date for which you want the Report:\c"
read dat
d1=`echo $dat|cut -c7-8`
m1=`echo $dat|cut -c5-6`
y1=`echo $dat|cut -c1-4`

yr=`expr "$d1" - 1`
case "$yr" in
        0)
           MONTH=`expr "$m1" - 1`
           YEAR=$y1
#           ;;  - This was not required
                case "$m1" in
                        0)
                           MONTH=12
                           YEAR=`expr "$y1" - 1`
                        ;;
                esac
        DAY=`cal $MONTH $YEAR |grep . | fmt -1 | tail -1`
;;
esac

kamitsin
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