假設我寫了一個母親的類別如下    mother.cpp ----------------------------------- class mother {   public:     int money; };    那我在BCB裡Form1裡寫了以下設定    Unit1.cpp ------------------------------------------- #include  #pragma hdrstop #include "Unit1.h" #include "mother.cpp" //--------------------------------------------------------------------------- #pragma package(smart_init) #pragma resource "*.dfm" TForm1 *Form1; mother Brother1; //宣告一個哥哥的子類別 //--------------------------------------------------------------------------- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { } //--------------------------------------------------------------------------- void __fastcall TForm1::Button1Click(TObject *Sender) { Brother1.money = "3000"; //告訴他哥哥的零用錢是3000 } 那我想在另一個Form裡宣告一個弟弟的子類別並得到Form1的哥哥類別的money變數，請問除了用extern的方法外，還有什麼方法嗎... Unit2.cpp ---------------------------------------------------------- #include #pragma hdrstop #include "Unit2.h" #include "Unit1.h" #include "mother.cpp" //--------------------------------------------------------------------------- #pragma package(smart_init) #pragma resource "*.dfm" TForm1 *Form2; mother Brother2;//宣告一個弟弟的子類別 //--------------------------------------------------------------------------- __fastcall TForm2::TForm2(TComponent* Owner) : TForm(Owner) { } //--------------------------------------------------------------------------- void __fastcall TForm2::Button1Click(TObject *Sender) { //我想在這裡取得哥哥類別的money變數 }

引言: mother.cpp ----------------------------------- class mother { public: int money; }; #include "Unit1.h" #include "Unit2.h"

abdias 您好：小弟建意您將 #include "mother.cpp" 的層級拉高，同時建意您將class mother 放在mother.h 裡，因為小弟可能是才學粗淺所以第一次看過有人#include .cpp 的檔案，再來分別在您的 "Unit1.h" 裡引入 #include "mother.h" 並在class TForm1 裡宣告 { public: mother Brother1; }; 而在"Unit2.cpp" 裡引入 #include "Unit1.h" void __fastcall TForm2::Button1Click(TObject *Sender) { Form1->Brother1.money <----這就素葛葛的錢了 //我想在這裡取得哥哥類別的money變數 }

哦哦哦...我試出來了啦... 會include .cpp是因為我新增一個cpp檔而不是unit... 也可以說是亂試吧... 總之...謝謝你的回答...