流运算符重载，方便读写文件中的数值数据

namespace NumbericalStream

{

template <class T>

std::ofstream& operator << (std::ofstream& os, const T out)

{

os.write((char*)&out,sizeof(out));

return os;

}

 

template <class T>

std::ifstream& operator >> ( std::ifstream& is, T & in )

{

is.read((char*)&in,sizeof(in));

return is;

}

};

 

namespace IntStream

{

template <class T>

std::ofstream& operator << (std::ofstream& os, const T out)

{

os.write((char*)&out,sizeof(out));

return os;

}

 

template <class T>

std::ifstream& operator >> ( std::ifstream& is, T & in )

{

is.read((char*)&in,sizeof(in));

return is;

}

};