shell 脚本案例：要求输入五个数，统计五个数的和，最小值、最大值

[code]min=0max=100num=0sum=0while [ $num -lt 5 ]doread -p \'pls enter a int number:\' aexpr $a + 1 &>/dev/nullif [ $? -ne 0 ];thenecho \"your enter must be int\"exit 1fiif [ $a -gt 100 ];thenecho \"pls enter number must less than 100\"exit 1fisum=$((a+sum))[ $max -gt $a ] && max=$a[ $min -lt $a ] && min=$alet num++doneecho \"sum is: $sum\"echo \"min value: $max\"echo \"max value :$min\"