???????н???????????????????????????????.cpp?????

/*test.h*/
#ifndef TEST_H
#define TEST_H

#include <iostream>
using std::cout;
using std::endl;

class test
{
public:
 test():x(10){}
 inline void print();
 void display (int y);
private:
 int x;
};

#endif

/*test.cpp*/
#include <iostream>
#include "test.h"
using std::cout;
using std::endl;

void test::print()
{
 cout << x << endl;
}

void test::display(int y)
{
 cout << x * y << endl;
}

??????????????????main.cpp????????????????????

????error LNK2019:??????????????? "public: void __thiscall test::print(void)" (?print@test@@QAEXXZ)???÷???????? _main ?б????á???????????????????

int main()
{
 test T;
 T.display(10);
 //T.print();

 system("pause");
 return 0;
}

??????????н??????????????ó??????????????????????????.cpp?ж?????д?????????????????????з????????????????????????С?