DEV C++ linker error问题 多文件联合编译

Question

stack.hpp文件

/*--------------------------------------------------------------
Header file--This file contain declarations for class stack.
   (c++)     Written by:
             Date:2012-10-09
--------------------------------------------------------------*/
#ifndef STACK_HPP
#define STACK_HPP
#include <iostream>
using namespace std ;

class Stack
{
  public :
     enum { MaxSize = 6 };
     Stack() { top = -1 ; }
     //void push(int& element) ;
     //void pop() ;
     //void dump() ;
     //inline bool isFull() ;
     inline bool isEmpty();    
  private:
     //void errMsg(const char* pMsg) const ;
     int stack[MaxSize] ;
     int top ;
     int any_val ;
        
};

#endif

stack.cpp文件
*--------------------------------------------------------------
stack.cpp--Define methods for class stack.
    (c++)  Written by:
           Date:2012-10-09
--------------------------------------------------------------*/
#include "stack.hpp"

/*=======================isEmpty===============================
*/
bool Stack::isEmpty()
{
     return top < 0 ;
}//stack::isEmpty

client.cpp文件

/*--------------------------------------------------------------
client.cpp--Test Driver
     (c++)  Written by:
             Date:2012-10-09
--------------------------------------------------------------*/
#include "stack.hpp"

int main()
{
    //Local declarations
    Stack st ;
   
    //Statements
    if(st.isEmpty())
    {
       cout << "Ok" ;            
    }

    system("pause") ;
    return 0 ;
}//main

我已经建立了工程
错误信息： 

[Linker error] undefined reference to `Stack::isEmpty()'

  ld returned 1 exit status

 H:MyCodedownloadCPPstudyProcessExampleschapter03CLASSstackMakefile.win [Build Error]  [STACK.exe] Error 1

Answer 1

模板的分离编译，一般情况都是不把模版类的.h和.cpp分离，万不得已，那么就在需要使用自定义模版的地方使用#include "xxx.cpp"文件，这样可以编译连接成功

Answer 2

十分感谢你的回答，的确是这样

Answer 3

Note: It's imperative that the function's definition (the part between the {...}) be placed in a header file, unless the function is used only in a single .cpp file. In particular, if you put the inline function's definition into a .cpp file and you call it from some other .cpp file, you'll get an "unresolved external" error from the linker.

把inline移除或者把函数定义放到.hpp里面