百度试题 结果1 题目friend istream &operator>> 相关知识点: 试题来源: 解析 这个是C++的语法:定义了一个友元函数,operator >>,这个函数本身又是对操作符>>的重载,其返回的类型是istream的一个引用.涉及的概念:类、友元,操作符重载,流以及引用.反馈 收藏 ...
友元friend 机制允许一个类授权其他的函数访问它的非公有成员。友元声明以关键字friend 开头,它只能出现在类的声明中。由于友元不是授权友谊的类的成员,所以它们不受其在类体中被声明的public private 和protected 区的影响,这里我们选择把所有友元声明组织起来放在类头之后。 1classScreen {2friend istream&3operator...
题目试题源程序文件清单如下: #include #include using namespace std; class MiniString public: friend ostream &operator output friend istream &operator char temp[ 100]; //用于输入的临时数组 temp[0]='/0'; //初始为空字符串 input>>setw(100)>>temp;...
public: position(intm,intn); friend ostream&operator<<(ostream&out,constposition&s); friend istream&operator>>(istream&in,position&s); intx; inty; }; voidmain() { position m(3,4); cout<<m<<endl; cout<<"输入x,y\n"; cin>>m; cout<<m<<endl; } position ::position(intm,int...
有如下类定义: class MyClass { public: ___ private: int data; }; 若要为MyClass类重载流输入运算符“>>”,使得程序中可以“cin>>obj;”的形式改变MyClass类的对象obj中数据成员d
r,i; public: complex() { i=r=0;} friend istream& operator>>(istream&, complex&); friend ostream& operator<<(ostream&,complex&); }; istream& operator>>(ifstream &din, complex &x) { din>>x.r; din>>x.i; return din; } ostream& operator<...
void display(){cout<<real<<"+"<<imag<<"i"<<endl;} friend ostream& operator<<( ostream& os,Complex& c){ os<<c.real<<"+"<<c.imag<<"i"; return os; } friend istream& operator>>(istream& is,Complex& c){ is>>c.real>>c.imag; ...
From what I know about friend functions this should work. I'm not sure what's going on. In my code i define a class template < class IType = unsigned int > class BitArray { ... friend ostream& operator<<(ostream&, const BitArray&); friend istream& operator>>(istream&, BitArray...
class time { private: int dd,mm,yy; public: friend istream & operator >>(istream &ip,time &t); // declare function as friend to allow private memeber access friend ostream & operator <<(ostream &op,time &t); // declare function as friend to allow private memeber access void validat...
friend ostream & operator<>(istream &, matrix &); private: int mat[2][3]; }; matrix::matrix() { for(int i=0;i<2;i++)>(istream &in,matrix & b) { for(int i=0;i<2;i++)>>b.mat[i][j]; return in; } int main() { matrix a,b,c; cin>>a; cin>>b; cout< 相关...