迭代器从后往前遍历不行吗?//iterator itr = m_PolygonV3a->end();*itr出错error！

[mirroatl170]

！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！

[微型蚂蚁]

reverse_iterator

[zybjtu]

ostream& operator<<(ostream& out, list<int> lst){
    list<int>::iterator iter=lst.begin();
    while(iter!=lst.end())
        out<<setw(4)<<*iter++;
    out<<endl;
    return out;
}

int main(){
    int a[]={2,-1,3,5,-9,11,2,1};
    list<int> lst(a,a+sizeof(a)/sizeof(int));
    cout<<lst;
    list<int>::reverse_iterator rIter=lst.rbegin();//rbegin = reverse begin
    while(rIter!=lst.rend())//rend= reverse end
        cout<<setw(4)<<*rIter++;
    system("pause");
}

[mirroatl169]

俩个不同智能指针对象指向同一个地址可以吗？？？

引用 2 楼 zyaiwx 的回复:

ostream& operator<<(ostream& out, list<int> lst){
    list<int>::iterator iter=lst.begin();
    while(iter!=lst.end())
        out<<setw(4)<<*iter++;
    out<<endl;
    return out;
}

int main(){
    int a[]={2,-1,3,5,-9,11,2,1};
    list<int> lst(a,a+sizeof(a)/sizeof(int));
    cout<<lst;
    list<int>::reverse_iterator rIter=lst.rbegin();//rbegin = reverse begin
    while(rIter!=lst.rend())//rend= reverse end
        cout<<setw(4)<<*rIter++;
    system("pause");
}