任意3个数，判断最大数

#!/bin/bash

echo "please enter three number:"

read -p "the first number is :" n1

read -p "the second number is :" n2

read -p "the third number is :" n3

let MAX=$n1

if [ $n2 -ge $n1 ]

then

MAX=$n2

fi

if [ $n3 -ge $MAX ]

then

MAX=$n3

fi

echo "the max number is $MAX"