C++/g++ cygwin_exception::open_stackdumpfile：将堆栈跟踪转储到 *.exe.stackdump

Question

这是我在 Airport.cpp 中的主要内容：

#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;

这是我的 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;
}

我还有一门课叫飞机。我用来编译和链接的命令是 g++ -std=c+11 -Wall -g -o airport Airport.cpp Airplane.cpp Airport_Queue.cpp 如何修复此运行时错误？错误是当我调用enqueue 时。然后我得到了

4 [main] airport 3796 cygwin_exception::open_stackdumpfile：将堆栈跟踪转储到 airport.exe.stackdump

请。谢谢你。

Answer 1

我看到的问题：

1. 您有一个成员变量size。您需要两个 - 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;
   }
   

   你需要：

   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;
   }
   

你需要：

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

1. 在Airport_Queue::enqueue

   根据析构函数的逻辑，需要更改以下行。

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

   改成：

   tail = (tail+1) % capacity;
   

2. 在Airport_Queue::dequeue

   您遇到与上述类似的错误。换行

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

   到

   head = (head+1) % capacity;
   

3. 在Airport_Queue::isFull

   换行

   if (size == sizeof(a))
   

   到

   if (size == capacity)
   

我希望这可以解决您的大部分问题。如果有什么我遗漏的，希望你能找到它们。