问答题

在下列程序的横线处填上适当的语句，使输出为：0,2,10。
#include ＜ iostream.h ＞
#include ＜ math.h ＞
class Magic
{ double x;
public:
Magic (double d = 0.00):x ( fabs (d) )
{}
Magic operator + ()
{
return Magic( sqrt( x * x + c.x * c.x) );
}
operator ＜＜ ( ostream & stream, Magic & c)
{ stream ＜＜ c.x;
return stream;
}
};
void main()
{ Magic ma;
cout ＜＜ ma ＜＜ ", " ＜＜ Magic (2) ＜＜ ", " ＜＜ ma + Magic ( - 6) + Magic ( - 8 ) ＜＜ endl;
}

【参考答案】

Magic& c
friend ostream&

<上一题目录下一题>

热门试题

问答题

在下面横线处填上正确的内容，完成类的定义。class Baseint x;static const int b;public:Base( int, int);const int &a;};______ b=15;Base::Base(int i, int j): ______{}

问答题

#include ＜ iostream ＞using namespace std;class Date;class Time{ public:Time ( int h, int m, int s){ hour = h; minute = m; sec = s; }void show(Date& d);private:int hour, minute, sec;};class Date{ public:Date( int m, int d, int y){ month = m; day = d; year = y; }void Time::show( Date &);private:int month, day, year;};void Time:: show( Date& d){ cout ＜＜ d.month ＜＜ - ＜＜ d.day ＜＜ - ＜＜ d.year ＜＜ endl;cout ＜＜ hour ＜＜ : ＜＜ minute ＜＜ : ＜＜ sec ＜＜ endl;}void main (){ Time t1 (9,23,50);Date d1 (12,20,2010);t1.show( d1 );}

相关试题