C++基础之运算符重载

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1、运算符重载输入输出：#includeusingnamespacestd;classEmp{stringname;doublesalary;public:Emp(stringname="",doublesalary=0):name(name),salary(salary){}voidshow()const{cout<

2、m&operator>>(istream&is,Emp&e){//也可以直接写进类中returnis>>e.name>>e.salary;}};//输出运算符函数ostream&operator<<(ostream&o,constEmp&e){o<

3、intx=10;//cout.operator<<(int);cout<>(e2),operator>>(cin,e2)cin>>e2;cout<usingnamespacestd;classPerson{stringname;intage;public:

4、Person(stringname="",intage=0):name(name),age(age){}Person&operator++(){//前加加（成员函数）age++;return*this;}/*friendPerson&operator++(Person&p){//前加加（有元函数）p.age++;returnp;}*/constPersonoperator++(int){//后加加（成员函数）Personold=*this;age++;returnold;}/*friendconstPersonoperator++(Person&p,int

5、){//后加加(友元函数)Personold=p;p.age++;returnold;}*/friendostream&operator<<(ostream&o,constPerson&p){returno<usingnamespacestd;classInteger{int

6、x;public:Integer(intx=0):x(x){}friendostream&operator<<(ostream&o,constInteger&i){returno<>(istream&is,Integer&i){returnis>>i.x;}/*constIntegeroperator+(constInteger&i){returnx+i.x;}*/friendconstIntegeroperator+(constInteger&a,constInteger&b){returnInt

7、eger(a.x+b.x);}constIntegeroperator-(constInteger&i)const{returnx-i.x;}friendbooloperator<(constInteger&a,constInteger&b){returna.x

8、iostream>usingnamespacestd;classD