小编con*_*man的帖子

我真的卡住了,我在"CTree.add(num);"收到错误 说'CTree'是未声明的,这没有意义,因为我在tree.h中初始化它？

该程序应该提示用户,用户输入一个命令(即"添加3",只有0-9个整数),然后我希望它将该数字插入树中.

//File: tree.h

class CTree
{
private:
    CTree* m_pLeft;
    CTree* m_pRight;
    CTree* m_pRoot;
    int m_nData;

public:

    CTree();

    bool isEmpty() const { return m_pRoot; }
    bool search(int);
    void print_inorder();
    void inorder(CTree*);
    void Add(int);
    void remove(int);
    void height();
};

//File: CTree.cpp

#include <iostream>
#include <cstdlib>

using namespace std;

CTree::CTree()
{
 m_pRoot=NULL;
}

bool CTree::search(int x)
{
    if(x==m_nData) return true;
    if(x < m_nData){ //go left
       if(m_pLeft != NULL) //if possible
            return m_pLeft->search(x);
    }
    else //go right
       if(m_pRight != NULL) //ifpossible
            return …

这真的令人沮丧,我尝试了我的类和构造函数的多种变体,通过谷歌搜索结果和本网站上的其他问题进行筛选,但我无法弄清楚.我相信这个错误很简单,我忽略了.

错误代码:

1>main.cpp(60): error C2065: 'Student' : undeclared identifier
1>main.cpp(60): error C2146: syntax error : missing ';' before identifier 'newStudent'
1>main.cpp(60): error C3861: 'newStudent': identifier not found

student.h

#ifndef STUDENT_H
#define STUDENT_H
class Student {  
    private:
    static const int SIZE = 7;         // initial size of the array
    int *Students;                     // Students will point to the dynamically allocated array
    //int numStudents;                   // number of students currently in the list
    int rosterSize;                    // the current size of the roster
    int student_id; …