C++/G ++ cygwin_exception :: open_stackdumpfile：轉儲堆棧跟蹤* .exe.stackdump

Question

這裏是我的主要在Airport.cpp：

#include <iostream> 
#include "Airport_Queue.h" 
#include "Airplane.h" 
#include <stdlib.h> 

int main(){ 

    Airplane *b = new Airplane(true); 
    (*b).come(); 
    (*b).go(); 
    std::cout << "........." << std::endl; 
    Airport_Queue *landing_queue = new Airport_Queue(5); 
    Airplane *a0 = new Airplane(true); 
    (*landing_queue).enqueue(a0); //error here 
    //(*landing_queue).dequeue(); 

return 0; 

這是我Airport_Queue.cpp

#include "Airport_Queue.h" 
Airport_Queue::Airport_Queue(unsigned n){ 
    Airplane** a = new Airplane*[n]; 
    capacity = n; 
    size = 0; 
    head = tail = 0; 
} 
Airport_Queue::~Airport_Queue(){ 
    for (size_t i = 0; i < size; i++){ 
     delete a[i]; 
    } 
    delete [] a; 
} 
void Airport_Queue::enqueue(Airplane* airplane){ 
    if (!(*this).isFull()){ 
     a[tail] = airplane; 
     (*a[tail]).come(); 
     tail = (tail+1) % capacity; 
     size++; 
    } 
    else{ 
     std::cerr << "Queue is full." << std::endl; 
    } 
} 
Airplane* Airport_Queue::dequeue(){ 
    if (!(*this).isEmpty()){ 
     size_t x = head; 
     (*a[head]).go(); 
     head = (head+1) % capacity; 
     size--; 
     return a[x]; 
    } 
    else{ 
     std::cerr << "Queue is empty." << std::endl; 
     return NULL; 
    } 
} 
bool Airport_Queue::isEmpty(){ 
    if (size == 0) 
     return true; 
    else 
     return false; 
} 
bool Airport_Queue::isFull(){ 
    if (size == capacity) 
     return true; 
    else 
     return false; 
} 
int Airport_Queue::getSize(){ 
    return size; 
} 

我也有一個叫飛機的課。我用來編譯和鏈接的命令是 g++ -std=c+11 -Wall -g -o airport Airport.cpp Airplane.cpp Airport_Queue.cpp 我該如何解決這個運行時錯誤？錯誤是當我打電話enqueue。然後我得到

4 [主]機場3796 cygwin_exception :: open_stackdumpfile：轉儲堆棧跟蹤airport.exe.stackdump

請。謝謝你。

Answer 1

問題，我看到：

1. 你有一個成員變量size。你需要兩個 - capacity和size。

2. 在Airport_Queue::Airport_Queue

   Airport_Queue::Airport_Queue(unsigned size){ 
       Airplane** a = new Airplane*[size]; 
       size = 0; // This is the argument, not the member variable. 
          // The member variable remains uninitialized. 
       head = tail = 0; 
   } 
   

   您需要：

   Airport_Queue::Airport_Queue(unsigned size){ 
       Airplane** a = new Airplane*[size]; 
       this->capacity = size; 
       this->size = 0;    
       head = tail = 0; 
   } 
   

3. 在Airport_Queue::~Airport_Queue

   Airport_Queue::~Airport_Queue(){ 
       for (size_t i = 0; i < sizeof(a); i++){ 
        // sizeof(a) does not give you the number of elements 
        // in the array. It just gives you the size of the pointer. 
        delete a[i]; 
       } 
       delete [] a; 
   } 
   

您需要：

Airport_Queue::~Airport_Queue(){ 
     for (size_t i = 0; i < this->size; i++){ 
      delete a[i]; 
     } 
     delete [] a; 
    } 

1. 在Airport_Queue::enqueue

   繼從析構函數的邏輯，以下行需要被改變。

   tail = (tail+1) % sizeof(a); 
   

   將其更改爲：

   tail = (tail+1) % capacity; 
   

2. 在在Airport_Queue::dequeue

   您有類似上述的錯誤。更改線路

   head = (head+1) % sizeof(a); 
   

   到

   head = (head+1) % capacity; 
   

3. 在Airport_Queue::isFull

   更改線路

   if (size == sizeof(a)) 
   

   到

   if (size == capacity) 
   

我希望這可以解決您的大部分問題。如果有任何我錯過了，希望你能找到它們。