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POC++ compiler error: "isLeaf() has not been declared" - but it was
 

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  1. POC++ compiler error: "isLeaf() has not been declared" - but it was
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    <pre><code>#include &lt;cstdlib&gt; #include &lt;iostream&gt; #include "Node.h" #ifndef HW4_H #define HW4_H using namespace std; /** You are to implement the two functions in this class. You can add any other method or members to it as well. However, you cannot change their signature. **/ class HW4{ public: int count(Node* r) const { if(r-&gt;next==NULL&amp;&amp;r-&gt;bro==NULL) { return 0;} if(r.isLeaf()) { return ((1+count(r-&gt;next)+count(r-&gt;bro))); } count(r-&gt;next); } /* This method will return true if the tree rooted at node sn can answer the demand induced by its leaves. */ bool canDemandBeAnswered(Node* root) { if(count(root)&gt;(root.getCapacity())) { return 0; exit(0); } else { return (canDemandBeAnswered(root-&gt;next)&amp;&amp;canDemandBeAnswered(root-&gt;bro)); } } /* This method should return a linked list of nodes representing the customers with the overall highest revenue. The resulting list should conform to the capacity limitations. */ // Node* getBestCustomers(Node* root); }; #endif #include &lt;cstdlib&gt; #ifndef NODE_H #define NODE_H /** The Node class. You must implement the two methods isLeaf() and addChild(Node*) below. Otherwise, you can add any methods or members your heart's desire. The only limitation is that they have to be in this file. **/ class Node { private: int capacity; int price; public: /** Hint: to be used for saving the Node's children and for returning the linked list **/ Node* next; Node* bro; Node(){ capacity = 0; price = 0; } Node(int capacity_){ capacity = capacity_; price = 0; } //should return true if this node has no children, false otherwise. //this method adds a child to this node. int getCapacity(){ return capacity; } int getPrice(){ return price; } void setPrice(int price_){ price = price_; } bool isLeaf() { if((this-&gt;next)-&gt;capacity==0) return 1; else return 0; } void addChild(Node* child) { Node* temp; if(this-&gt;next!=NULL) { temp=this-&gt;next; child-&gt;bro=temp; this-&gt;next=child; } else this-&gt;next=child; } }; #endif </code></pre> <p>I get the following error: "isLeaf() has not been declared". I don't understand why - I declared both.</p>
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