leap2.sh

来自「Solaris环境下Shell编程编程」· Shell 代码 · 共 24 行

#!/bin/sh

# Script name: leap_scr2_sh

# Assume the user enters the year on the command line 
# when they execute the script.

if [ $# != 1 ]
then
        echo "You need to enter the year." 
        exit 1
fi

year=$1

if [ `expr $year % 400` -eq 0 -o \
	`expr $year % 4` -eq 0 -a `expr $year % 100` -ne 0  ]
then
	echo "$year is a leap year!"
else 
	echo "$year is not a leap year."
fi