各位达人帮忙看下

[Gengoo]

头文件
#include <iostream.h>

struct CNode
{
	int  nNode;
	CNode *pNext;
};

class PNode
{
public:
	int  CNodeCount;		//节点数量
	CNode *pHeadNode;		//节点
public:

	int InitData();
	int WriteToFile(char *sFile);
	int ReadToNode(char *sFile);
	int DestNode();

	void printfNode();

	PNode()
	{
		CNodeCount     = 0;
		pHeadNode      = NULL;
	}
	~PNode()
	{
	}

};

源文件
#include "test.h"
#include <iostream.h>
#include <stdio.h>
#include <stdlib.h>


int PNode::InitData()
{

	pHeadNode = new CNode;
	if (pHeadNode == NULL)
	{
		cout << "不能分配内存空间!" << endl;
		exit(0);
	}

	CNode *curNode, *tailNode;

	curNode = pHeadNode;

	int value;

//为什么下面不能给头结点赋值,输入值后,pHeadNode->nNode没有值
	while (cin >> value && value != 0)
	{
		tailNode = new CNode;
		if (tailNode == NULL)
		{
			cout << "不能分配内存空间!" << endl;
			exit(0);
		}

		tailNode->nNode = value;
		curNode->pNext = tailNode;
		curNode = tailNode;
	}

	curNode->pNext = NULL;

	return 0;
}

void PNode::printfNode()
{
	CNode *ptrNode = new CNode;
	ptrNode = pHeadNode;

	while (ptrNode)
	{
		cout << ptrNode->nNode << ', '<< endl;
		ptrNode = ptrNode->pNext;
	}
}

void main()
{
	PNode *pNode = new PNode;
	pNode->InitData();
	pNode->printfNode();
}

[effective_person]

#include "stdafx.h"
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace std;

struct CNode
{
    int  nNode;
    CNode *pNext;
};

class PNode
{
public:
    int  CNodeCount;        //节点数量
    CNode *pHeadNode;        //节点
public:

    int InitData();
    int WriteToFile(char *sFile);
    int ReadToNode(char *sFile);
    int DestNode();

    void printfNode();

    PNode()
    {
      CNodeCount     = 0;
       pHeadNode      = NULL;
    }
    ~PNode()
    {
    }

};


int PNode::InitData()
{

    pHeadNode = new CNode;
    if (pHeadNode == NULL)
    {
        cout << "不能分配内存空间!" << endl;
        exit(0);
    }

    CNode *curNode, *tailNode;
	//pHeadNode->pNext=NULL;
    curNode = pHeadNode;

    int value;

//为什么下面不能给头结点赋值,输入值后,pHeadNode->nNode没有值
    while (cin >> value && value != 0)
    {
        tailNode = new CNode;
        if (tailNode == NULL)
        {
            cout << "不能分配内存空间!" << endl;
            exit(0);
        }
        tailNode->nNode = value;
        curNode->pNext = tailNode;
        curNode = tailNode;
    }
	curNode->pNext = NULL;

    return 0;
}

void PNode::printfNode()
{
 //   CNode *ptrNode = new CNode;
	CNode* ptrNode = pHeadNode->pNext;

    while (ptrNode)
    {
        cout << ptrNode->nNode << "  "<< endl;//是输出的问题 ‘1’有误！
        ptrNode = ptrNode->pNext;
    }
}

void main()
{
    PNode *pNode = new PNode;
   pNode->InitData();
    pNode->printfNode();
}

[fallinleave]

int PNode::InitData()
{

    CNode *curNode, *tailNode， *pHeadNode;

    curNode = pHeadNode = tailNode = NULL;
    int value;

//为什么下面不能给头结点赋值,输入值后,pHeadNode->nNode没有值
    while (cin >> value && value != 0)
    {
        tailNode = new CNode;
        if (tailNode == NULL)
        {
            cout << "不能分配内存空间!" << endl;
            exit(0);
        }

        tailNode->nNode = value;
        if(NULL == curNode)
        {
             pHeadNode = tailNode;
             curNode = tailNode;
        }
        curNode->pNext = tailNode;
        curNode = tailNode;
    }

    curNode->pNext = NULL;

    return 0;
}

[fallinleave]

//为什么下面不能给头结点赋值,输入值后,pHeadNode->nNode没有值
你输入的第一个值就给第二个节点了，当然没有值了

[baihacker]

#include <iostream.h>

struct CNode
{
    int  nNode;
    CNode *pNext;
};

class PNode
{
public:
    int  CNodeCount;        //节点数量
    CNode *pHeadNode;        //节点
public:
	
    int InitData();
    int WriteToFile(char *sFile);
    int ReadToNode(char *sFile);
    int DestNode();
	
    void printfNode();
	
    PNode()
    {
        CNodeCount     = 0;
        pHeadNode      = NULL;
    }
    ~PNode()
    {
    }
	
};

#include <iostream.h>
#include <stdio.h>
#include <stdlib.h>


int PNode::InitData()
{
	
    pHeadNode = new CNode;
    if (pHeadNode == NULL)
    {
        cout << "不能分配内存空间!" << endl;
        exit(0);
    }
	
    CNode *curNode, *tailNode;
	
    curNode = pHeadNode;
	
    int value;
	
	//为什么下面不能给头结点赋值,输入值后,pHeadNode->nNode没有值
    while (cin >> value && value != 0)
    {
        tailNode = new CNode;
        if (tailNode == NULL)
        {
            cout << "不能分配内存空间!" << endl;
            exit(0);
        }
		
        tailNode->nNode = value;
        curNode->pNext = tailNode;
        curNode = tailNode;
    }
	
    curNode->pNext = NULL;
	
    return 0;
}

void PNode::printfNode()
{
    CNode *ptrNode = pHeadNode->pNext;
	
    while (ptrNode)
    {
        cout << ptrNode->nNode << ','<< endl; //', '多了一个空格
        ptrNode = ptrNode->pNext;
    }
}

void main()
{
    PNode *pNode = new PNode;
    pNode->InitData();
    pNode->printfNode();
}

1
2
3
0
1,
2,
3,
Press any key to continue