[問題] 運算子=的多載
程式碼如下:
#include <iostream>
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(void)
{
cout << "Window " << id << ": " << title << endl;
}
~CWin()
{
delete [] title;
}
CWin(const CWin &win)
{
id=win.id;
strcpy(title,win.title);
}
void copy_id(CWin &win)
{
id=win.id;
}
void copy_title(CWin &win)
{
strcpy(this->title,win.title);
}
};
void operator=(CWin &win1,CWin &win2)
{
win1.copy_id(win2);
win1.copy_title(win2);
}
int main(void)
{
CWin win1('A',"Main window");
CWin win2;
win1.show();
win2.show();
win1=win2;
win1.show();
win2.show();
return 0;
}
我把operator=()函數寫成一般函數
但是出現錯誤訊息入下:
error C2801: 'operator =' must be a <Unknown> member
請問是哪裡有問題
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