链接时错误 初学者需要高手帮忙

[dch1287]

/////////////////////////////////////////// main.cpp
#include <iostream>
#include "client.h"

using namespace std;

int main()
{
Client oneClient("akuma",200);
char *changeServerName = new char[20];

cin >> changeServerName;

oneClient.ChangeServerName(changeServerName);

cout << oneClient.getServerName();

return 0;
}

////////////////////////////////////////////// client.h
#include <iostream>
using namespace std;

class Client {
private:
static char *ServerName;
static int ClientNum;
public:
Client(char *itsServerName,int itsServerNum);
static int ChangeServerName(char *changeServerName);
static char *getServerName();
};

/////////////////////////////////////////// client.cpp

#include "client.h"

Client::Client(char *itsServerName,int itsClientNum) {
ServerName = itsServerName;
ClientNum = itsClientNum;
}

Client::ChangeServerName(char *itsServerName) {
ServerName = itsServerName;

return 0;
}

char* Client::getServerName() {
return ServerName;
};


/////////////////////////////////////////////// error
Linking...
client.obj : error LNK2001: unresolved external symbol "private: static int Client::ClientNum" (?ClientNum@Client@@0HA)
client.obj : error LNK2001: unresolved external symbol "private: static char * Client::ServerName" (?ServerName@Client@@0PADA)
Debug/main.exe : fatal error LNK1120: 2 unresolved externals
Error executing link.exe.

main.exe - 3 error(s), 0 warning(s)

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[AleTiff]

它说，，，你不能在.h文件里定义实现，定义了它也装作没看到。NND！编译器好牛B也～～～

[dch1287]

没有啊 我哪有在 client.h 里定义实现了？

[en2113]

NND,我也是这个问题

[pongba]

静态变量需要在实现文件内显式定义。
在.cpp文件内加上：
char* Client::ServerName;
int Client::ClientNum;

[csucdl]

楼上的正解
更好加上初始化

[csucdl]

char *Client::ServerName = "";
int Client::ClientNum = 0;

[AleTiff]

晕！！！这都不明白～～～～唉～～～～

编译器只把cpp编译为obj，链接器从obj中拼装。你再看看你的cpp里有没有Client这个类？没有啊！！！链接器得到一个没有Client这个类的obj，它不向你要它向谁要去？？？

NND！！！这点小问题都要我回复第二次～～～～～！！！！唉