比较两个整数的大小
#!/bin/sh #defined the number read -p "please input two number:" a b [ -z "$a" ] || [ -z "$b" ] && { echo "USEGE:Num1 Num2" exit 1 } #check two number is integer expr $a + 0 &>/dev/null RETVAL1=$? expr $b + 0 >/dev/null 2>&1 RETVAL2=$? [ $RETVAL1 -eq 0 ] && [ $RETVAL2 -eq 0 ] || { echo "please input two number" exit 2 } #compare the two number [ $a -lt $b ] && { echo "$a < $b" exit 0 } [ $a -eq $b ] && { echo "$a = $b" exit 0 } [ $a -gt $b ] && { echo "$a > $b" exit 0 }
网友留言(0 条)