在此 C++ 代码中,我尝试删除向量末尾的元素,但程序停止并且我收到消息:Expression: vector erase iterator outside range.
问题是什么?
毕竟,通过这段代码,向量是指针向量,还是我在 Push_back 中传递它们的方式仅插入指针的副本?
int _tmain(int argc, _TCHAR* argv[])
{
vector<Player*> allPlayers;
allPlayers = createPlayers();
int numPlayers;
cout<<"Vector size: "<<allPlayers.size();
cout<<endl;
cout<<"How many players are involved in the game(1-4)?\n";
cin>>numPlayers;
cout<<endl;
allPlayers.erase(allPlayers.end());
return 0;
}
vector<Player*> createPlayers(){
Player *Player1 = new Player(1,1500);
Player *Player2 = new Player(2,1500);
Player *Player3 = new Player(3,1500);
Player *Player4 = new Player(4,1500);
vector<Player*> allPlayers;
allPlayers.push_back(Player1);
allPlayers.push_back(Player2);
allPlayers.push_back(Player3);
allPlayers.push_back(Player4);
return allPlayers;
}
.end()
返回迭代器超过最后一个元素。这就是您收到该错误的原因。您希望迭代器指向最后一个元素。不超过最后一个元素。
因此尝试将该行更改为:
allPlayers.erase(allPlayers.end() - 1);
并确保正确处理向量为空的情况。
或者你可以使用.pop_back()
,但无论哪种情况,您都需要处理内存泄漏以及评论中提到的问题。
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