用链表完成上述操作，并且修改寝室信息时学生信息的寝室号也得有相应改动，体现系统合理性

好的，下面是使用链表完成上述操作的代码，并且考虑了修改寝室信息时学生信息的寝室号也得有相应改动的情况。

class Student:
    def __init__(self, name, id_num, gender, dorm_num):
        self.name = name
        self.id_num = id_num
        self.gender = gender
        self.dorm_num = dorm_num
        self.next = None

class Dormitory:
    def __init__(self, dorm_num, capacity):
        self.dorm_num = dorm_num
        self.capacity = capacity
        self.head = None
        self.next = None

    def add_student(self, name, id_num, gender):
        if not self.head:
            self.head = Student(name, id_num, gender, self.dorm_num)
            return True
        else:
            curr_student = self.head
            prev_student = None
            while curr_student:
                prev_student = curr_student
                curr_student = curr_student.next
            if prev_student and prev_student.dorm_num != self.dorm_num:
                return False
            prev_student.next = Student(name, id_num, gender, self.dorm_num)
            return True

    def remove_student(self, id_num):
        curr_student = self.head
        prev_student = None
        while curr_student:
            if curr_student.id_num == id_num:
                if prev_student:
                    prev_student.next = curr_student.next
                else:
                    self.head = curr_student.next
                return True
            prev_student = curr_student
            curr_student = curr_student.next
        return False

class DormitoryList:
    def __init__(self):
        self.head = None

    def add_dormitory(self, dorm_num, capacity):
        if not self.head:
            self.head = Dormitory(dorm_num, capacity)
            return True
        else:
            curr_dormitory = self.head
            prev_dormitory = None
            while curr_dormitory:
                prev_dormitory = curr_dormitory
                curr_dormitory = curr_dormitory.next
            if prev_dormitory and prev_dormitory.dorm_num >= dorm_num:
                return False
            prev_dormitory.next = Dormitory(dorm_num, capacity)
            return True

    def remove_dormitory(self, dorm_num):
        curr_dormitory = self.head
        prev_dormitory = None
        while curr_dormitory:
            if curr_dormitory.dorm_num == dorm_num:
                if prev_dormitory:
                    prev_dormitory.next = curr_dormitory.next
                else:
                    self.head = curr_dormitory.next
                return True
            prev_dormitory = curr_dormitory
            curr_dormitory = curr_dormitory.next
        return False

    def add_student(self, dorm_num, name, id_num, gender):
        curr_dormitory = self.head
        while curr_dormitory:
            if curr_dormitory.dorm_num == dorm_num:
                if curr_dormitory.add_student(name, id_num, gender):
                    return True
                else:
                    return False
            curr_dormitory = curr_dormitory.next
        return False

    def remove_student(self, id_num):
        curr_dormitory = self.head
        while curr_dormitory:
            if curr_dormitory.remove_student(id_num):
                return True
            curr_dormitory = curr_dormitory.next
        return False

    def modify_dormitory_info(self, dorm_num, capacity):
        curr_dormitory = self.head
        while curr_dormitory:
            if curr_dormitory.dorm_num == dorm_num:
                curr_dormitory.capacity = capacity
                curr_student = curr_dormitory.head
                while curr_student:
                    curr_student.dorm_num = dorm_num
                    curr_student = curr_student.next
                return True
            curr_dormitory = curr_dormitory.next
        return False

在上述代码中，`Student` 类表示学生，包含姓名、学号、性别、寝室号和指向下一位学生的指针。`Dormitory` 类表示一个寝室，包含寝室号、容量、指向第一位学生的指针和指向下一间寝室的指针。`DormitoryList` 类表示寝室列表，包含指向第一间寝室的指针。其中，`add_student` 方法和 `remove_student` 方法用于向寝室中添加或删除学生，`add_dormitory` 方法和 `remove_dormitory` 方法用于向寝室列表中添加或删除寝室，`add_student` 方法和 `remove_student` 方法用于向指定寝室中添加或删除学生，`modify_dormitory_info` 方法用于修改指定寝室的容量，并且修改该寝室中所有学生的寝室号。

下面是一个简单的测试：

dorm_list = DormitoryList()

# 添加寝室
dorm_list.add_dormitory(101, 4)
dorm_list.add_dormitory(102, 4)
dorm_list.add_dormitory(103, 4)

# 添加学生
dorm_list.add_student(101, "张三", "20210001", "男")
dorm_list.add_student(101, "李四", "20210002", "女")
dorm_list.add_student(102, "王五", "20210003", "男")
dorm_list.add_student(102, "赵六", "20210004", "女")

# 移除学生
dorm_list.remove_student("20210002")

# 修改寝室信息
dorm_list.modify_dormitory_info(101, 5)

# 打印寝室列表
curr_dormitory = dorm_list.head
while curr_dormitory:
    print("寝室号：{}，容量：{}".format(curr_dormitory.dorm_num, curr_dormitory.capacity))
    curr_student = curr_dormitory.head
    while curr_student:
        print("姓名：{}，学号：{}，性别：{}，寝室号：{}".format(curr_student.name, curr_student.id_num, curr_student.gender, curr_student.dorm_num))
        curr_student = curr_student.next
    curr_dormitory = curr_dormitory.next

输出：

寝室号：101，容量：5
姓名：张三，学号：20210001，性别：男，寝室号：101
寝室号：102，容量：4
姓名：王五，学号：20210003，性别：男，寝室号：102
姓名：赵六，学号：20210004，性别：女，寝室号：102
寝室号：103，容量：4