mql5 类来实现哈希映射

最新推荐文章于 2025-12-09 19:50:25 发布

原创最新推荐文章于 2025-12-09 19:50:25 发布 · 380 阅读

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#include <Generic/HashMap.mqh>


class CTrade {
public:
    double entryPrice;
    double exitPrice;
    CTrade(double entry, double exit) : entryPrice(entry), exitPrice(exit) {}
    ~CTrade() {Print("CTrade destructor called");}
};

//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
//---
   test();  
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//---
   
  }
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
//---

  }

void test()
{
// 创建哈希表（键为string，值为CTrade指针）
CHashMap<string, CTrade*> objMap;

// 添加类实例
objMap.Add("Trade1", new CTrade(1.1000, 1.1050));
objMap.Add("Trade2", new CTrade(1.2000, 1.2050));

// 访问对象
CTrade* tradePtr = NULL;
if(objMap.TryGetValue("Trade1", tradePtr) && tradePtr != NULL) {
    Print("Trade1 entry: ", tradePtr.entryPrice);
}

// 注意：需要手动管理内存！

CleanupHashMap(objMap);
}

void CleanupHashMap(CHashMap<string, CTrade*>& map) {
    for(int i = 0; i < map.Count(); i++) {
        CTrade* ptr = map.GetValueAt(i);
        if(CheckPointer(ptr) == POINTER_DYNAMIC) {
            delete ptr;
        }
    }
    map.Clear();
}