作者mosluce ()
看板C_and_CPP
標題Re: [問題] cin >> 自訂類別物件
時間Wed Sep 30 10:30:27 2009
//新問題!!!
//code:
Class A{
public:
A();
~A();
friend istream& operator>>(istream& in, A& a){
in >> a._value;
return in;
}
friend ostream& operator<<(ostream& out, const A& a){
out << a._value;
return out;
}
private:
char* _name;
char* _value;
}
int main(){
A a();
cin >> a;
cout << a;
return 0;
}
//編譯錯誤訊息
//錯誤：ambiguous overload for 'operator>>' in 'std::cin >> a'
//警告：the address of `Collection a()', will always evaluate as `true'
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 219.85.58.90
1F：→ adrianshum:不是 member function 吧... 09/30 10:41
※ 編輯: mosluce 來自: 219.85.58.90 (09/30 10:47)
2F：→ mosluce:手誤忘記打 friend 錯誤依舊 09/30 10:52
3F：→ adrianshum:我說: "不是 member function 吧..." 09/30 11:40
4F：推 layan:A a(); => 改成 A a; XDXDXD 09/30 22:42
5F：推 LPH66:不會是樓上的問題.... 09/30 23:56
6F：→ LPH66:原PO仔細想想一樓推文的意思... 09/30 23:57