if [ $score -gt 100 ];thenecho "分数不正确"elif [ $score -ge 80 ];thenecho "优秀"elif [ $score -ge 60 ];thenecho "及格"elif [ $score -ge 0 ];thenecho "不及格"else echo "分数不正确"fi
筛选分数等级
原文：https://blog.51cto.com/15077385/2589575
