[問題] 用operator=()改以friend來撰寫

看板C_and_CPP作者j19920816 (Kaung)時間8年前 (2016/07/03 16:02)推噓10(10推 0噓 9→)

留言19則, 7人參與討論串1/1

開發平台(Platform): (Ex: VC++, GCC, Linux, ...) DEV C++ 錯誤結果(Wrong Output)：編譯器出現"void operator=(CWin&, CWin&)' must be a nonstatic member function" 的錯誤程式碼(Code)：(請善用置底文網頁, 記得排版) #include<iostream> #include<cstdlib> using namespace std; class CWin { private: char id,*title; public: CWin(char i='D',char *text="Default window"):id(i) { title=new char[50]; strcpy(title,text); } void set_data(char i,char *text) { id=i; strcpy(title,text); } void show() { cout<<"Window "<<id<<": "<<title<<endl; } ~CWin() { delete [] title; } CWin(const CWin &win) { id=win.id; strcpy(title,win.title); } friend void operator=(CWin &win1,CWin &win2);//在類別裡宣告 }; void operator=(CWin &win1,CWin &win2)///類別外面定義 { win1.id=win2.id; strcpy(win1.title,win2.title); } int main() { CWin win1('A',"Main window"); CWin win2; win1.show(); win2.show(); operator=(win1,win2); cout<<endl<<"設定 win1=win2之後..."<<endl; win1.show(); win2.show(); win1.set_data('B',"hello window"); cout<<endl<<"更改win1的資料成員後..."<<endl; win1.show(); win2.show(); system("pause"); return 0; } 請問一下是哪邊出現了問題@@?? 謝謝大家 -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 123.110.33.145 ※ 文章網址: https://www.ptt.cc/bbs/C_and_CPP/M.1467532951.A.06D.html

推

LiloHuang

07/03 16:25, , 1^F

07/03 16:25, 1^F

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LiloHuang

07/03 16:26, , 2^F

07/03 16:26, 2^F

可是這是書上的習題，還是書上說錯了@@？ ※ 編輯: j19920816 (49.217.16.96), 07/03/2016 16:37:10

推

LiloHuang

07/03 16:44, , 3^F