vector's OP

akira32

vector's OP

我想?h除c所有m_index等於2的元素,???一下要如何???

struct elem
{
public:
        int m_index;
        int m_number;
        elem(int _index,int _number)
        {
                m_index=_index;
                m_number=_number;
        }
};

void CTest0525Dlg::OnButton2()
{
        // TODO: Add your control notification handler code here
        std::vector<elem> c;
        c.push_back(elem(1,1));
        c.push_back(elem(2,2));
        c.push_back(elem(2,3));
        c.push_back(elem(3,4));
        c.push_back(elem(4,5));

        std::vector<elem>::iterator pos;

        //pos=std::find(c.begin(),c.end(),2);
        //c.erase(pos);
               
        for (pos=c.begin();pos!=c.end();++pos)
        {
                TRACE(">>>>index=%d,number%d\n",pos->m_index,pos->m_number);
        }

        TRACE(">>>> size=%d\n",c.size());       
}

6spring

用std::map<int,elem>吧

当然也可以重载elem的 bool operator == (const int _index)

william9527

void CTest0525Dlg::OnButton2()
{
        ...

        vector<elem>::iterator it;
       
        it = stable_partiton(c.begin(), c.end(), bind1st(not_equal_to<int>(), 2));

        c.erase(it, c.end());
}

william9527

抱歉，写错了，没看到ｃ是个结构，修改如下：

bool notEqualTo2(const elem &e)
{
        if(e.m_index == 2)
                return false;
        return true;
}

void CTest0525Dlg::OnButton2()
{
        ...

        vector<elem>::iterator it;

        it = stable_partiton(c.begin(), c.end(), notEqualTo2);

        c.erase(it, c.end());
}

akira32

?了