優先級隊列編譯錯誤

Question

我正在嘗試編譯下面的代碼，但編譯器給出了錯誤

Struct.h:38:9: error: ‘priority_queue’ in namespace ‘std’ does not name a type

幾次搜索未能透露答案，所以我希望你們能幫忙。 該代碼部分基於c ++參考站點上給出的示例代碼。

struct aimedShot;
union moveFunc;
struct timeCommand;

struct aimedShot
{
    void (*move) (Dot*, SDL_Event&, double x, double y);
    double x;
    double y;
};

//Holds the kind of function used
union moveFunc
{
    void (*notAimed) (Dot*);
    aimedShot aimed;
};

//Dot to be operated on and the appropriate operator with time
struct timeCommand
{
    Dot* target;    
    moveFunc command;
    int time;
    bool type; //True indicates aimed (integer inputs), False indicates unaimed
 }; 

class CompareCommand
{
     public:
     bool operator()(timeCommand& c1, timeCommand& c2) //Return true if c1 comes first
    {
        return (c1.time < c2.time);
    }
};

typedef std::priority_queue< timeCommand, std::vector<timeCommand>, CompareCommand> commandTimeline;

Answer 1

為了能夠使用std::priority_queue<>類模板，您需要#include <queue>標准頭。