//删除vector中指定下标的元素,加&可以改变vector的值,不加就不会改变
void ControlCards::deleteCard(vector<int> &cards,int index) {
vector<int>::iterator it = cards.begin()+index ;
cards.erase(it);
}
void ControlCards::deleteCard(vector<int> &cards,int index) {
vector<int>::iterator it = cards.begin()+index ;
cards.erase(it);
}
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