c++程序—switch分支

#include<iostream>
using namespace std;
#include<string>

int main()
{
    //多元分支
    cout << "请输入学生的分数:" << endl;
    int score;
    cin >> score;
    cout << "您输入学生的分数为：" << score << endl;
    if (score <= 100 && score >= 0)
    {
        switch (score / 10)
        {
        case 10:;
        case 9:cout << "该学生成绩优异" << endl; break;
        case 8:;
        case 7:cout << "该学生成绩良好" << endl; break;
        case 6:cout << "该学生成绩及格" << endl; break;
        default:cout << "该学生成绩不及格，明年再战" << endl; break;



        }
    }
    else
        cout << "请重新输入正确的分数" << endl;


    
    system("pause");
    return 0;

}