错误关联器 C++实现

-----------------------------------------------ErrorCorrelator.h----------------------------------------------#include<ostream>
#include<string>
#include<queue>
#include<stdexcept>

//error 类声明
class Error
{
public:
 Error(int priority,std::string errMsg):
   mPriority(priority),mError(errMsg){}

   int getPriority() const {return mPriority;}

   std::string getErrorString() const {return mError;}

 

   friend bool operator<(const Error& lhs,const Error &rhs);

   friend std::ostream& operator<<(std::ostream &str,const Error &err);
protected:
 int mPriority;
 std::string mError;
};

//error类容器，返回最高优先级的错误
class ErrorCorrelator
{
public:
 ErrorCorrelator(){};

 ////向优先队列中添加元素
 void addError(const Error& error);

 
   //取得最优先元素
 Error getError() throw (std::out_of_range);

protected:
 std::priority_queue<Error> mErrors;

private:
   //prevent assignment and pass-by-refernence
 ErrorCorrelator(const ErrorCorrelator &src);

 ErrorCorrelator & operator=(const ErrorCorrelator &rhs);

};

//比较符<重载
bool operator<(const Error& lhs,const Error &rhs)
{
 return lhs.mPriority<rhs.mPriority;
}

//输出符<<重载
std::ostream& operator<<(std::ostream &str,const Error &err)
{
 str << err.mError <<"(priority  "<<err.mPriority<<")"<<std::endl;
 return (str);
}

//向优先队列中添加元素
void ErrorCorrelator::addError(const Error &error)
{
 mErrors.push(error);
}

//取得最优先元素
Error ErrorCorrelator::getError() throw(std::out_of_range)
{
 //判断优先队列是否为空
 if(mErrors.empty())
 {
  throw(std::out_of_range("No elements!"));
 }
 //获取对头元素
 Error top = mErrors.top();
  // 弹出队头元素
 mErrors.pop();

 return top;
}

---------------------------------------------------主函数-------------------------------------------------------

#include "stdafx.h"
#include<iostream>
#include "ErrorCorrelator.h"
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
 ErrorCorrelator ec;
 ec.addError(Error(3,"Unable to read file!"));
 ec.addError(Error(1,"Incorrect entry from user!"));
 ec.addError(Error(10,"Unable to allocate memory!"));

 while(1)
 {
  try
  {
   Error e = ec.getError();
   cout << e << endl;
  }
  catch(out_of_range&)
  {
   cout<<"Finished processing errors!"<<endl;
   break;
  }
 }

 system("pause");
 return 0;
}

-----------------------------------------------------程序测试--------------------------------------------------Unable to allocate memory!(priority  10)

Unable to read file!(priority  3)

Incorrect entry from user!(priority  1)

Finished processing errors!
请按任意键继续. . .