c++ - ***检测到 glibc*** 免费(): invalid pointer:

Question

当我尝试运行我的代码时，标题中出现错误...这是我正在运行的

class MyQueue {
    tile* queue;
    int size;
public:
    MyQueue(int cap);
    ~MyQueue();
    void enqueue(tile t);
    tile dequeue();
    bool isEmpty();
};

void MyQueue::enqueue(tile t) {
queue[size] = t;
size++;
}

tile MyQueue::dequeue() {
tile temp = queue[0];
tile* victim = queue;
queue++;
delete victim;
return temp;
}

bool MyQueue::isEmpty() {
if (size == 0)
    return true;
else
    return false;
}

MyQueue::MyQueue(int cap) {
queue = new tile[cap];
size = 0;
}

MyQueue::~MyQueue() {
delete[] queue;
}

int main(int argc, char *argv[]) {
tile tile1; tile1.type = '1';
tile tile2; tile2.type = '2';
tile tile3;

MyQueue q(10);
q.enqueue(tile1);
q.enqueue(tile2);
tile3 = q.dequeue();
cout<<tile3.type<<" =1?"<<endl;
return 0;
}

瓦尔格林德:

==4506== Mismatched free() / delete / delete []
==4506==    at 0x4C27FFF: operator delete(void*) (vg_replace_malloc.c:387)
==4506==    by 0x400CD2: MyQueue::dequeue() (MyQueue.h:37)
==4506==    by 0x400DD7: main (p1.cpp:24)
==4506==  Address 0x5964040 is 0 bytes inside a block of size 120 alloc'd
==4506==    at 0x4C28658: operator new[](unsigned long) (vg_replace_malloc.c:305)
==4506==    by 0x400D35: MyQueue::MyQueue(int) (MyQueue.h:49)
==4506==    by 0x400D9F: main (p1.cpp:21)
==4506== 
1 =1?
==4506== Invalid free() / delete / delete[]
==4506==    at 0x4C27C7B: operator delete[](void*) (vg_replace_malloc.c:409)
==4506==    by 0x400D74: MyQueue::~MyQueue() (MyQueue.h:54)
==4506==    by 0x400E2F: main (p1.cpp:21)
==4506==  Address 0x596404c is 12 bytes inside a block of size 120 free'd
==4506==    at 0x4C27FFF: operator delete(void*) (vg_replace_malloc.c:387)
==4506==    by 0x400CD2: MyQueue::dequeue() (MyQueue.h:37)
==4506==    by 0x400DD7: main (p1.cpp:24)
==4506== 
==4506== 
==4506== HEAP SUMMARY:
==4506==     in use at exit: 0 bytes in 0 blocks
==4506==   total heap usage: 1 allocs, 2 frees, 120 bytes allocated
==4506== 
==4506== All heap blocks were freed -- no leaks are possible
==4506== 
==4506== For counts of detected and suppressed errors, rerun with: -v
==4506== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 4 from 4)

看起来很蠢，但我一辈子都弄不明白，谢谢你的帮助

Answer 1

问题可能是因为在构造函数中你动态分配了一个数组:

queue = new tile[cap]; 

但在 deque 中，您使用非数组删除运算符将其删除。

tile* victim = queue;
queue++;
delete victim;  

只是看起来代码中的逻辑不匹配。一方面，有分配动态数组的代码，但在其他地方，它删除了动态分配数组的各个元素。