Question

该计划的目标是用6“医生队列”模拟医疗综合体。我试着把它保持足够接近我已经完成的Java版本（必须用3种语言来做）。此时，当我运行DequeuePatients和ListPatients方法时，程序意外终止，没有错误。我已经尝试过调试器，但eclipse忽略了我的所有断点。为什么它会终止？

ListPatients方法在Driver类中全部跟随：

void ListPatients() {

    int x, QueueChoice = 0;
    bool exit = false;``

    while (!exit) {
        for (x = 1; x <= MAX; x++) {
            cout << x << ": " << Doctor[x - 1] << "\n";
        } // end-for

        cout << "Choose a Queue to List From";
        cin >> QueueChoice;

        if (OpenFlag[QueueChoice - 1] == true) { //open flag for each queue
        int i = Complex[QueueChoice - 1]->GetSize();//Global array of queues
        //cout <<i<<endl;

如果调用函数

，则在此循环中终止

 for (x = 1; x <= i; x++) {
        Patient This = Complex[QueueChoice-1]->GetInfo(x); //Program Terminates here
        cout << x<< ": " << endl;//This.ID_Number;
           //<<Complex[QueueChoice - 1]->GetInfo(x + 1).PrintMe()
    } // end-for
} // end-if

cout << "Press 1 to List Another Queue, press 2 to exit";
cin >> x;
switch (x) {
case 1:
    break;
case 2:
    exit = true;
    break;
  }//switch
 } // end-while
} // List Patients`

队列类GetInfo和toArray（）：

/*Return Patient info from each Node*/
Patient Queue::GetInfo(int Pos) {
    Node* ComplexArray= new Node[Length];
     ComplexArray = this->toArray();
    return ComplexArray[Pos - 1].Info;
}

// The toArray method
Node* Queue::toArray() {
    // Copy the information in each node to an array and return the array.
    int x = Length;
    Node ComplexArray[Length] ={} ;
    Node* Current = new Node();
    Current = Rear;`
    for (x = 0; x<Length;x++) {
        ComplexArray[x] = Node();
        ComplexArray[x].Modify(Current);
        Current = Current->Next;
    }
    return ComplexArray;
} // End of toArray method

在节点中修改方法：

 void Node :: Modify(Node* ThisNode)
 {
     Info = ThisNode->Info;
     Next = ThisNode->Next;
 }

Answer 1

如果这是零基数，为什么要从x

中减去1

for (x = 0; x<Length;x++) {
    ComplexArray[x-1] = Node();
    ComplexArray[x - 1].Modify(Current);
    Current = Current->Next;
}

下标错误是C / C ++中的硬崩溃。

Answer 2

问题是基本的，我正在宣布我的指针，以及更改toArray函数以返回一个患者指针（可被视为一个数组？）与Node相关的方式，而不仅仅是数组的第一个元素。

这导致toArray返回一个Node指针，实例Next指针连续指向自身。

Queue Complex[6] = Queue(); //in driver class Patient* ComplexArray[Length] = new Patient();//Queue Class GetInfo & toArray

我需要：

Queue* Complex = new Queue[MAX]; Patient* ComplexArray = new Patient[Length];

并更改了这些功能：

Patient Queue::GetInfo(int Pos) {
    Patient* ComplexArray = new Patient[Length];
    ComplexArray= toArray();

    return ComplexArray[Pos - 1];
}

// Now returns Patient pointer of Node->Info to GetInfo
Patient* Queue::toArray() {
    Node* Current;
    int x;
    Patient* ComplexArray =  new Patient[Length];
    Current = Rear;
    for (x = 1; x <= Length; x++) {
        ComplexArray[x-1] = Patient();
        ComplexArray[x - 1].Modify(Current->Info);
        Current = Current->Next;
    }
    return ComplexArray;
} // End of toArray method

程序意外终止C ++

2 个答案: