std :: vector< A>错误C2582：'operator ='函数不可用 [英] std::vector<A> error C2582: 'operator =' function is unavailable in

问题描述

im使用简单的向量push_back到A类型的对象
并得到此错误
这是我的代码：

im using simple vector push_back to object of Type A and getting this error , this is my code :

class A 
{
    public:
    A(int a,int b,int c);
};


#include "A.h"
....
....
....
....
std::vector<A>* vec_objects = new std::vector<A>();

while(....some condition ...) 
{

    A a(1,2,3)
    vec_objects->push_back(a);
}

遇到此错误：

c:\program files\microsoft visual studio 9.0\vc\include\xutility(3159) : error C2582: 'operator =' function is unavailable in 'A'
1>        c:\program files\microsoft visual studio 9.0\vc\include\xutility(3187) : see reference to function template instantiation 'void std::_Fill<A*,_Ty>(_FwdIt,_FwdIt,const _Ty &)' being compiled
1>        with
1>        [
1>            _Ty=A,
1>            _FwdIt=A *
1>        ]
1>        c:\program files\microsoft visual studio 9.0\vc\include\vector(1231) : see reference to function template instantiation 'void std::fill<A*,_Ty>(_FwdIt,_FwdIt,const _Ty &)' being compiled
1>        with
1>        [
1>            _Ty=A,
1>            _FwdIt=A *
1>        ]
1>        c:\program files\microsoft visual studio 9.0\vc\include\vector(1153) : while compiling class template member function 'void std::vector<_Ty>::_Insert_n(std::_Vector_const_iterator<_Ty,_Alloc>,unsigned int,const _Ty &)'
1>        with
1>        [
1>            _Ty=A,
1>            _Alloc=std::allocator<A>
1>        ]
1>       

我做错了什么？

推荐答案

您需要为A类添加operator =和copy-constructor

You need to add operator= and copy-constructor to class A

class A 
{
    public:
    A(int a,int b,int c);
    A(const A& element);
    A& operator=(const A& element);     //which needs definition
};

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