杭电 2004

 1 #include <iostream>

 2 using namespace std;

 3 char grand(int);

 4 int main()

 5 {

 6     int n;

 7     while (cin>> n)

 8     {

 9         if (n>100 || n<0)

10         {

11             cout << "Score is error!" << endl;

12             continue;

13         }

14         cout<< grand(n)<< endl;

15     }

16 }

17 

18 char grand(int n)

19 {

20     switch (n/10)

21     {

22     case 9:

23     case 10:

24         return 'A';

25         break;

26     case 8:

27         return 'B';

28         break;

29     case 7:

30         return 'C';

31         break;

32     case 6:

33         return 'D';

34         break;

35     default:

36         return 'E';

37         break;

38     }

39 }