怎么修正[Error] expected '}' at end of input

    switch (option) {
        case 1: {
            string course;
            cout << "请输入科目名称（格式为语文、数学、英语、物理、化学、生物）：";
            cin >> course;
            bool found = false;
            int index = -1;
            for (int j = 0; j < num_of_courses; j++) {
                if (courses[j] == course) {
                    found = true;
                    index = j;
                    break;
                }
            }
            if (!found) {
                cout << "输入的科目不存在！\n";
                break;
            }
            
            double sum = 0.0;
            double scores_ordered[num_of_students];
            for (int i = 0; i < num_of_students; i++) {
                sum += scores[i][index];
                scores_ordered[i] = scores[i][index];
            }
            double average_score = sum / num_of_students;
            cout << "所有同学" << course << "科目的平均成绩为："
                 << setprecision(2) << fixed << average_score << "\n";
            
            for (int i = 0; i < num_of_students - 1; i++) {
                for (int j = i + 1; j < num_of_students; j++) {

你需要检查花括号是否都配对