--------------ErrorCorrelator.h----------------------------------------------#include
#include
#include
#include
//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
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 } //输出符<<重载 std::ostream& operator<<(std::ostream &str,const Error &err) { str << err.mError <<"(priority "< 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 #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!"< 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. . . 作者 heyongluoyao8