操作符重载.xml

pre{
line-height:1;
color:#1e1e1e;
background-color:#d2d2d2;
font-size:16px;}.sysFunc{color:#627cf6;font-style:italic;font-weight:bold;}
.selfFuc{color:#800080;}
.bool{color:#d2576f;}
.condition{color:#000080;font-weight:bold;}
.key{color:#000080;}
.var{color:#800000;font-style:italic;}
.Digit{color:#ff00ff;font-weight:bold;}
.includePre{color:#1e1e1e;}
.operator?{color:#008000;font-weight:bold;}

操作符重载

?
#include?<iostream>
#include?<string>
using?namespace?std;
?
//定义水果类
?class?Fruit
{
??string?name;
??string?colour;
public:
?????????friend?istream&?operator>>(istream&,Fruit&);????????????????????//?输入流
?????????friend?ostream&?operator<<(ostream&?out,const?Fruit&?fruit);???????//?输出流
?????????void?print()
?????????{
???????????????????cout<<colour<<"?"<<name<<endl;
?????????}
?
?????????Fruit(const?string?nst="apple",const?string?cst="green"):name(nst),colour(cst)
?????????{
?????????}
?
?????????~Fruit()
?????????{
?????????}
};
?
?
//重载操作符
ostream&?operator<<(ostream&?out,?const?Fruit?&s)
{
?????????out<<s.colour<<"?"<<s.name<<endl;
?????????return?out;
?
}
?
istream&?operator>>(istream&?in,Fruit?&s)
{
?????????in>>s.colour>>s.name;
?????????if?(!in)
?????????{
???????????????????cerr<<"Wrong?input!"<<endl;
?????????}
?????????return?in;
}
?
?
?

主程序：

?????????Fruit?apple;
?????????cin>>apple;
?????????cout<<apple;
?

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