程序意外终止C ++

Question

The goal of the program is to simulate a medical complex with 6 "Doctor Queues". I tried keeping it close enough to the Java version I've completed (must do this in 3 languages). At this point when I run the DequeuePatients and ListPatients method, the program terminates unexpectedly with no errors. I've tried the debugger but eclipse is ignoring all my breakpoints.Why is it terminating?

The ListPatients method is all follows in Driver class:

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;

1. Terminates in this loop if function is called

     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` 

Queue Class GetInfo and 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

Modify Method in Node:

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

Answer 1

If this is base-zero why are you subtracting 1 from x

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

Subscript errors are hard crashes in C/C++.

Answer 2

The problem was sort of basic, it was way I was declaring my pointers, as well as changing the toArray function to return a Patient pointer(That can be treated as an array?) as apposed to Node, and not just to the first element of the array.

this caused toArray to return one Node pointer, with that instances Next pointer continuously pointing to itself.

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

I needed:

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

and changed these functions:

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