为什么发生堆损坏?

时间:2018-11-04 14:12:23

标签: c++ arrays pointers memory-corruption

我有一个展开的链接列表

class UnrolledLinkedList {
    Node* head;
    Node* tail;
    int size; //num of elements in List
    int numOfNodes;
    int nodeSize;
}

具有这样的Node

class Node {
private:
    int maxElements;
public:
    int numElements; // number of elements in this node, up to maxElements
    int* elements; // an array of numElements elements,
    Node *next; // reference to the next node in the list
    Node *prev; // reference to the previous node in the list
}

我想将元素放入数组中。这是我的功能:

int* UnrolledLinkedList::toArray() {
int* arr = new int(size);
Node* pTemp = head;
int i = 0, j = 0, temp = 0;
while (pTemp) {
    i = 0;
    while (i < pTemp->numElements) {
        if (i != 0) j++;
        *(arr + j) = pTemp->elements[i];
        i++;
    }
    pTemp = pTemp->next;
    j++;
}
return arr;
}

当我打电话给

int* arr = list->toArray();
int n = list->getSize();
printf("The list after converted to array:\n");
            if (n > 0) {
                for (int i = 0; i < n; i++)
                    printf("%d ", arr[i]);
                printf("\n");
                delete[] arr;
            }
            else {
                printf("NULL\n");
            }

在主要情况下,它在第delete[] arr;行发现了错误的HEAP CORRUPTION DETECTED 请帮我! 预先谢谢你!

1 个答案:

答案 0 :(得分:10)

以下陈述与您的想法不符:

    int* arr = new int(size);

它将创建一个单独的int,其值是size

您的代码肯定可以更好地配合:

    int* arr = new int[size];