How do I call these functions?

This is a discussion on How do I call these functions? within the C++ Programming forums, part of the General Programming Boards category; This inOrder appears to be decreasing. If you pass in 5 for value, and the first number in the list ...

  1. #16
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    This inOrder appears to be decreasing. If you pass in 5 for value, and the first number in the list is 2, then 5 < 2 will be false, and we won't walk the list. Is it supposed to be increasing? (If so, then that < would need to become a >.)

  2. #17
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    Ohhh yeah good eye. I guess so, but like I said, I can't change it. I guess I'll just flip my data around and treat it as decreasing. Now just one more question...how do I implement the functions that have LListNode<Data>* as parameters?

  3. #18
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    Quote Originally Posted by Todd88 View Post
    Ohhh yeah good eye. I guess so, but like I said, I can't change it. I guess I'll just flip my data around and treat it as decreasing. Now just one more question...how do I implement the functions that have LListNode<Data>* as parameters?
    Carefully. They would be just like any other parameters; since they are pointers, that means you can modify the LListNode being pointed to, etc.

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    I just don't know what to put there as a parameter. Is it just LListNode<int> node? Because it's complaining at me again :/

  5. #20
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    You would need to pass a pointer to the node.

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    Sorry I have no idea how to do that.

  7. #22
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    Just like you would pass a pointer to anything else: with &.

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    Remember I can't edit the header file. I'm not sure how to pass a pointer to a node when all I have to work with is my main function. I used the addToEnd function to create my list and therefore really don't even use nodes myself. I don't know how to do this part.

  9. #24
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    What does editing the header file have to do with anything? Every variable has an address, that you can get by prefix the variable name with &. So if a function needs the address of a variable, you should give it the address of the variable.

    Note also, as you can see in the addToEnd function, that the new keyword gives you a pointer to a <whatever you created>.

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    I'm sorry I have had the worst time with pointers and passing parameters. I am great at everything else but I can't seem to get this point. It is so frustrating because I know it's the simplest thing in the world but I just can't get it. It really makes me so mad knowing that this is simple and I can't understand!!

    Edit::sorry it was just that simple. I just needed to create a node via LListNode<int>* node; and use that...I'm embarassed.
    Last edited by Todd88; 11-26-2008 at 11:30 PM.

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