有关操作符重载问题

[dulei_nn]

//---------------------------------------------------------------------------

#ifndef Unit2H
#define Unit2H
//--------------------------------------------------------------------------
#include <iostream>
class TimeDL
{
private:
    int m_hours;
    int m_minutes;
public:
    TimeDL();
    TimeDL(int h = 0, int m = 0);
    void AddMin(int m);
    void AddHour(int h);
    void Reset(int h = 0, int m = 0);
    TimeDL operator +(const TimeDL &t)const;
    TimeDL operator +(int h)const; 
    TimeDL operator -(const TimeDL &t)const;
    TimeDL operator *(int f)const;
    friend TimeDL operator *(int f, const TimeDL &t){return t * f;}
    friend std::ostream & operator <<(const std::ostream & os, const TimeDL &t);
};
#endif 

红色部分,编译器错误提示：
[C++ Error] Unit2.cpp(36): E2015 Ambiguity between 'TimeDL::TimeDL()' and 'TimeDL::TimeDL(int,int)'

[startservice]

函数重载和默认参数的问题。

[dulei_nn]

嗯 谢谢，写完之后发现了这个问题。