Binary Search Tree - In-order Traversal

Question

I am trying to make a crossword puzzle program utilizing BST's, i currently have the following words inserted into the tree:

word, will, wyr, wale, wilt, apple, abs, wack(inserted in that order)

but everytime i debug the program in visual studio, i get an error

Exception thrown at 0x008DE28C in AVLBSTcrosswordhunter.exe: 0xC0000005: Access violation writing location 0x0000001C.

However, when tracing the variables my traversed variable is never set to 1, so i do not exit this while loop, the error is happening inside, im just not sure where and why.

while (!traversed)
{
    if (temp != NULL)
    {
        if (temp->word.substr(0, sub_num) == value.substr(0, sub_num))
        {
            count++;
        }
        s.push(temp);
        temp = temp->left;
    }
    else
    {
        if (!s.empty())
        {
            temp = s.top();
            s.pop();
            temp = temp->right;
        }
        if (s.empty())
        {
            traversed = 1;
        }
    }
}

for clarification, the word i'm searching for is "w***"(the '*' being wildcards), so the if statement checks to see if the pointer temp has the substring w, and if sound it increases count so i can send a number back on how many match that wildcard search.

Also, temp is set to the root(word) before the while loop.

Thank you for any help that you can provide!

Answer 1

看来我匆忙完成此操作时创建了两个遍历变量和两个堆栈变量，现在看来可以正常工作！