刑警的射击成绩

#include <iostream>
using namespace std;
int main( )
{
    int i,a,b,c,d;
    a=b=c=d=0;
    do
    {
        cin>>i;
        switch (i)
        {
        case 0:
        case 1:
        case 2:
        case 3:
        case 4:
            d++;
            break;
        case 5:
        case 6:
            c++;
            break;
        case 7:
        case 8:
            b++;
            break;
        case 9:
        case 10:
            a++;
            break;
        }
    }
    while (i<=10);
    cout<<"A:"<<a<<endl;
    cout<<"B:"<<b<<endl;
    cout<<"C:"<<c<<endl;
    cout<<"D:"<<d<<endl;
    return 0;
}