杭电ACM2004

  
  

   
   56
67
100
123
  
  

  
  

   
   E
D
A
Score is error!
  
  

#include<iostream> 
#include<cmath>
using namespace std;
int main()
{
	double score;
	while (cin>>score)
	{
		if (score > 100 || score < 0)
			cout << "Score is error!" << endl;
		else
		{
			int f = score / 10;
			switch (f)
			{
			case 10:
				cout << "A" << endl;
				break;
			case 9:
				cout << "A" << endl;
				break;
			case 8:
				cout << "B" << endl;
				break;
			case 7:
				cout << "C" << endl;
				break;
			case 6:
				cout << "D" << endl;
				break;
				default:
					cout << "E" << endl;
					break;
			}
		}
	}
	/*int score;
	while (cin>>score)
	{
		if (score >= 90 && score <= 100)
			cout << "A" << endl;
		else if (score >= 80 && score <90)
			cout << "B" << endl;
		else if (score >= 70 && score <80)
			cout << "C" << endl;
		else if (score >= 60 && score <70)
			cout << "D" << endl;
		else if (score >= 0 && score < 60)
			cout << "E" << endl;
		else
			cout << "Score is error!" << endl;
	}*/
	
	return 0;
}