//运算符重载//重写的规则需要满足运算符本身的规则    class CMyPoint    {        int x, y;        public:        CMyPoint();        CMyPoint(int x, int y);        ~CMyPoint();        CMyPoint operator+(CMyPoint const& pt) const;//是不能修改this的值        friend CMyPoint operator-(CMyPoint const&p1, CMyPoint const & p2);        CMyPoint& operator++(); //前置，因为是自己，所以要加上&        CMyPoint operator++(int);//++后置，int是标识符 不使用& 是因为，先赋值在运算，赋值是产生一个临时变量先        friend ostream& operator<<(ostream& os, CMyPoint const& pt);//friend 因为在输入输出时，第一个参数不是this，而是输入输出流        friend istream& operator>>(istream& is, CMyPoint &pt);        };        CMyPoint CMyPoint::operator+(CMyPoint const& pt) const        {        CMyPoint tempPt;        tempPt.x = this->x + pt.x;        tempPt.y = this->y + pt.y;        return tempPt;    }    MyVector operator-( MyVector i, MyVector j)    {    return  MyVector(i.x-j.x, i.y-j.y);    }    CMyPoint& CMyPoint::operator++()    {        (*this).x++;        this->y++;        return *this;    }    CMyPoint CMyPoint::operator++(int)    {        CMyPoint tempPt = *this;        this->x++;        this->y++;        return tempPt;    }    ostream& operator<<(ostream& os, CMyPoint const& pt)    {        os << pt.x << '\t' << pt.y << endl;        return os;    }    istream& operator>>(istream& is, CMyPoint &pt)    {        is >> pt.x;        is >> pt.y;        return is;    }    CMyPoint operator-(CMyPoint const& p1, CMyPoint const& p2)    {        CMyPoint tempPt;        tempPt.x = p1.x - p2.x;        tempPt.y = p1.y - p2.y;        return tempPt;    }

 

 

//字符串的输入输出重载    ostream & operator << (ostream & os, CMyStr const& str)    {        os << str.pStr << '\n';        return os;    }    istream & operator >> (istream & is, CMyStr & str)    {        char * tempStr = new char[10240];        is >> tempStr;        if (str.pStr)        {            delete[]str.pStr;            str.pStr = NULL;        }        str.strcpy(tempStr);        delete[]tempStr;        return is;    }