basketball616的博客

#！/bin/bash read a if [ $a -lt 1 -o $a -gt 10 ] then echo "error number" elif [ $a -lt 5 ] then echo "it is less 5" else echo "it is not less 5" fi

# !/bin/bash echo "please input your grade:" read a if [ $a -ge 90 ] #大于 -gt (greater than) then #小于 -lt (less than) echo 'A' #大于或等于 -ge (greater than or eq...