几个典型运算符重载C++四.ppt

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1、7.3几个典型运算符重载2021/8/2217.3几个典型运算符重载数学类中常用的几个运算重载的特点和应用6.3几个典型运算符重载2021/8/2227.3.1重载++与--设AAobject；运算符++和--有两种方式：前置方式：++Aobject--Aobject后置方式：Aobject++Aobject--成员函数重载A::Aoperator++();解释为：Aobject.operator++();友员函数重载friendAoperator++(A&);解释为：operator++(Aobject);成员函数重载

2、A::Aoperator++(int);解释为：Aobject.operator++(0);友员函数重载：friendAoperator++(A&,int);解释为：operator++(Aobject,0)伪参数6.3.1重载++与--2021/8/223成员函数重载++#includeclassIncrease{public:Increase(){value=0;}voiddisplay()const{cout<

3、ncreaseoperator++(int);//后置private:unsignedvalue;};IncreaseIncrease::operator++(){value++;return*this;}IncreaseIncrease::operator++(int){Increasetemp;temp.value=value++;returntemp;}voidmain(){Increasea,b,n;for(inti=0;i<10;i++)a=n++;cout<<"n=";n.display();cout<<"a

4、=";a.display();for(i=0;i<10;i++)b=++n;cout<<"n=";n.display();cout<<"b=";b.display();}6.3.1重载++与--2021/8/224成员函数重载++#includeclassIncrease{public:Increase(){value=0;}voiddisplay()const{cout<

5、;//后置private:unsignedvalue;};IncreaseIncrease::operator++(){value++;return*this;}IncreaseIncrease::operator++(int){Increasetemp;temp.value=value++;returntemp;}voidmain(){Increasea,b,n;for(inti=0;i<10;i++)a=n++;cout<<"n=";n.display();cout<<"a=";a.display();for(i=0

6、;i<10;i++)b=++n;cout<<"n=";n.display();cout<<"b=";b.display();}Increaseoperator++();IncreaseIncrease::operator++(){value++;return*this;}++n;预定义版本6.3.1重载++与--2021/8/225成员函数重载++#includeclassIncrease{public:Increase(){value=0;}voiddisplay()const{cout<

7、lue<<'';};Increaseoperator++();//前置Increaseoperator++(int);//后置private:unsignedvalue;};IncreaseIncrease::operator++(){value++;return*this;}IncreaseIncrease::operator++(int){Increasetemp;temp.value=value++;returntemp;}voidmain(){Increasea,b,n;for(inti=0;i<10;i++

8、)a=n++;cout<<"n=";n.display();cout<<"a=";a.display();for(i=0;i<10;i++)b=++n;cout<<"n=";n.display();cout<<"b=";b.display();}Increaseoperator++();IncreaseIncreas