about using pthread in cpp

i just want to put *pthred_create* , *pthread_join* into one class,
but i do not know how to, anyone help me?

the code below is mine:
------------------------------
#include <pthread.h>
#include <iostream>

using namespace std;

class CppThread{
public:
  CppThread():num(0),slp(3){}
  CppThread(int n,int s):num(n),slp(s){}
  
  void create(){
    typedef void* (CppThread::*RUN)(void*);
    RUN r=&CppThread::run;
    pthread_create(&tid,NULL,(mem_fun(run),r),new int(num));
  }
  
  void join(){
    if(tid){
      pthread_join(tid,NULL);
    }
  }

private:
  pthread_t tid;
  int num;
  int slp;
  void* run(void *i){
    sleep(slp);
    cout<< "Thread num : " << num <<" \ti:"<< *(static_cast<int*>(i)) << endl;
    delete static_cast<int*>(i);
  }
  
};

int main(int argc,char*argv[]){

  CppThread ct1(1,10);
  CppThread ct2(2,5);
  ct1.create();
  ct2.create();
  ct1.join();
  ct2.join();
}

-------------------------------

i compile it with g++,and the msg is:

kdr2@kdr2-pc:~/work/by_lang/c_cpp/stdhk$ g++ cppthread.cpp
cppthread.cpp: In member function ???void CppThread::create()???:
cppthread.cpp:14: ????????? argument of type ???void* (CppThread::)(void*)??? does not match ???void* (CppThread::*)(void*)???
kdr2@kdr2-pc:~/work/by_lang/c_cpp/stdhk$

i think the type [void* (CppThread::)(void*)] and [void* (CppThread::*)(void*)] is the same one,aren't them?

--
http://kdr2.net

                                               ------yours Killy Draw