#! /bin/bash echo -n Input year to judge if it is a leap year: read year let "y1=$year % 4" let "y2=$year % 100" let "y3=$year % 400" if [ ! "$y1" -eq 0 ] then leap=0 elif [ ! "$y2" -eq 0 ] then leap=1 elif [ "$y3" -eq 0 ] then leap=1 else leap=0 fi if [ "$leap" -eq 1 ] then echo "$year is a leap year" else echo "$year is not a leap year" fi
[root@lenny Desktop]# ./ifrunnian.sh Input year to judge if it is a leap year:2003 2003 is not a leap year [root@lenny Desktop]# ./ifrunnian.sh Input year to judge if it is a leap year:2005 2005 is not a leap year [root@lenny Desktop]# ./ifrunnian.sh Input year to judge if it is a leap year:2008 2008 is a leap year