我正在学习C ++并且我尝试制作一个无信息的PlayerInfo图,这是因为我可以将它用作动态内存。我已经到了这个阶段,我正在努力扩展我的知识,并在我的实际项目中使用它。
要做到这一点,我想要一个说GetPlayerPointer(int playerid)的函数;而我想要做的就是返回列表中的位置,这样一段代码就可以做到这一点......更清楚。
??? GetPlayerPointer(int playerid)
{
auto point = BasicPlayerInfo.find(playerid);
return point->second;
}
然后这将允许我做类似
的事情Player = GetPlayerPointer(playerid);
Player.Score = 10;
我至少瞄准这些方面的东西。
我真的很抱歉,并感谢你的帮助。
实际代码:
struct pBasicInfo
{
bool IsLoggedIn = false;
bool Spawned = false;
int AdminLevel = 0;
std::string PlayerName;
};
extern std::unordered_map<int, pBasicInfo> BasicPlayerInfo;
//CreatePlayer
pBasicInfo SetupPlayer;
SetupPlayer.IsLoggedIn = true;
SetupPlayer.Spawned = false;
SetupPlayer.PlayerName = GetName(playerid);
BasicPlayerInfo.insert(std::pair<int, pBasicInfo>(playerid, SetupPlayer));
答案 0 :(得分:1)
返回引用,但你必须检查对象是否在地图中,如果不是,则执行某些操作:
pBasicInfo &GetPlayer(int playerid)
{
auto point = BasicPlayerInfo.find(playerid);
if( point == BasicPlayerInfo.end() )
throw std::runtime_error( "player not found" );
return point->second;
}
auto &player = GetPlayer( 123 );
player.Score = 10;
或者您可以返回指针,如果找不到播放器,则返回nullptr
,但调用者必须检查:
pBasicInfo *GetPlayerPointer(int playerid)
{
auto point = BasicPlayerInfo.find(playerid);
if( point == BasicPlayerInfo.end() )
return nullptr;
return &point->second;
}
auto player = GetPlayerPointer( 123 );
if( player ) player->Score = 10;