Binary Tree, makes pointer from integer without a cast

[21st100]

Hey Guys

I am consistently getting this error and cannot seem to find a solution for it...
I have pasted the relevant code beneath..
Any help will be appreciated...

Thanks

typedef struct node NODE;
 
 
struct node {
    int number;
    int freq;
    NODE *left, *right;
};

    NODE *new_number,*old_number;

   if (input < new_number->number) {
            if (new_number->left == NULL) {
                new_number->left = input;
                return 1;
            }
        old_number = old_number->left;
        } else {
            if (old_number->right == NULL) {
                old_number->right = input;
                return 1;
            }
            old_number = old_number->right;
        }
    }
 

[Banfa]

   if (input < new_number->number) {
            if (new_number->left == NULL) {
                new_number->left = input;
                return 1;
            }
        old_number = old_number->left;
        } else {
            if (old_number->right == NULL) {
                old_number->right = input;
                return 1;
            }
            old_number = old_number->right;
        }
    }
 

This looks like tree traversal but it isn't clear why you are using 2 pointers new_number and old_number and how the interact.

Your described problem is these 2 lines

new_number->left = input;
old_number->right = input;

You are assigning a variable of type int to a pointer of type NODE *. This is not going to work, in the long run you will end up with segmentation faults or tree errors. Imagine trying to add an integer value of 0 to the tree.

You should be creating a new node, assigning the value to the member number and storing a pointer to the new node.

[JosAH]

In lines #3 and #9 you're trying to set the left or right NODE pointer to 'input'
which is an int; hence the compiler diagnostic. You have to create a new NODE,
sets its data value to input and make the pointer point to the new node.

kind regards,

Jos

[21st100]

In lines #3 and #9 you're trying to set the left or right NODE pointer to 'input'
which is an int; hence the compiler diagnostic. You have to create a new NODE,
sets its data value to input and make the pointer point to the new node.

kind regards,

Jos

Hey Jos

You were Spot on...i cant believe i missed that...
I have corrected the error and it works like a charm..
Thanks for the help,

Cheers

[JosAH]

Hey Jos

You were Spot on...i cant believe i missed that...
I have corrected the error and it works like a charm..
Thanks for the help,

Cheers

You're welcome; the credits need to be split between me and Banfa because
he was a split second faster than I was; 51% for me, 49% for Banfa ;-)

kind regards,

Jos