g++编译的程序执行出错：munmap_chunk(): invalid pointer

qq948299114

我弄了一个Huffman编码程序，执行程序后总是出现错误信息munmap_chunk(): invalid pointer。查了资料知道动态分配的指针被修改以后会导致munmap_chunk() 我把可能出错的代码贴出来让大家帮忙改一下

HuffmanTree::HuffmanTree(const HuffmanTree &h){}

HuffmanTree::HuffmanTree(void)
{
root = new HuffmanNode[MAX_VALUE*2-1];
}

HuffmanTree::~HuffmanTree(void){delete []root;}】

这个好像没什么错误，还有


buffer = new char [(int)length];
   in.read (buffer,length);
   in.close();

   for(i=0; i<length; ++i)
   {
     tmp = (unsigned char)buffer[i];
     weight[tmp]++;
   }

//initialize the weight of each leaf node
for (int i = 0; i < MAX_VALUE; ++i)
root[i].weight = weight[i];

root[MAX_VALUE*2-1].weight = INT_MAX;
root[MAX_VALUE*2-2].index = -1;

   delete[] buffer;
return 0;
}