c++ - 二叉存储树 fstream 出错

Question

我目前有一个项目，我运行一个包含数千个名称的文本文件并将它们放入二进制存储树中。碰到这个错误的绊脚石:

error C2248: 'std::basic_ios<_Elem,_Traits>::basic_ios' : cannot access private member declared in class 'std::basic_ios<_Elem,_Traits>'    c:\program files (x86)\microsoft visual studio 10.0\vc\include\fstream  1116

希望有人能帮我解释一下根本问题。

提前致谢。

乔希

编辑:

BinaryTreeStorage::BinaryTreeStorage(void) : root(NULL)
{

}

BinaryTreeStorage::~BinaryTreeStorage(void)
{

}

void BinaryTreeStorage::insert(string &input, TreeNode *&root)
{
if(root != NULL)
{
    root -> name = input;
    root -> left = NULL;
    root -> right = NULL;
}

else if (input < root -> name)
{
    insert(input, root -> left);
}
else
{
    insert(input, root -> left);
}   
}

string BinaryTreeStorage:: writeToTree(TreeNode *&root)
{
if(root ->left != NULL)
{
    writeToTree(root ->left);
}
return root->name;
if (root->right != NULL)
{
    writeToTree(root);
}
}

void BinaryTreeStorage::write(ofstream nameOut)
{
cout << "Writing out bst names" << endl;
writeToTree(root);
}

void BinaryTreeStorage::read(ifstream& nameIn)
{
cout<< "Reading in bst" << endl;
string name;

for (int i = 0; i < numberOfNames; i++)
{
    nameIn >> name;
    insert (name, root);
}
}

Answer 1

在您的write 函数中:您不能复制ofstream。通过引用传递它。话又说回来，你似乎从来没有在正文中使用 nameOut 函数参数，所以为什么不完全省略它呢:

void BinaryTreeStorage::write()
{
    cout << "Writing out bst names" << endl;
    writeToTree(root);
}