hdu 2004 成绩转换

成绩转换

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 117938    Accepted Submission(s): 51743

Problem Description

输入一个百分制的成绩t，将其转换成对应的等级，具体转换规则如下： 90~100为A; 80~89为B; 70~79为C; 60~69为D; 0~59为E;

Input

输入数据有多组，每组占一行，由一个整数组成。

Output

对于每组输入数据，输出一行。如果输入数据不在0~100范围内，请输出一行：“Score is error!”。

Sample Input

56

67

100

123

Sample Output

E

D

A

Score is error!

 #include<iostream>
 #include <string>
 using namespace std;
 int main(){
     int score;
     while (cin >> score) {
         if (score >=  && score <= )
         {
             if(score >=){
                 if(score >= ){
                     if (score >= )
                         cout << "A" << endl;
                     else
                         cout << "B" << endl;
                 }
                 else
                     cout << "C" << endl;
             } else {
                 if (score >= )
                     cout << "D" << endl;
                 else
                     cout << "E" << endl;
             }
         }
         else
             cout << "Score is error!" << endl;
     }

     //system("pause");
     return ;
 }