单项选择题

有以下程序
#include ＜iostream＞
using namespace std;
class Complex

public:
Complex (double r=0, double i =0 :re(r) ,im (i)
double real() const return re;
double imag() const return im;
Complex operator + (Complex c const
return Complex(re+c.re, im+c.im);
privane:
double re,im;
;
int main

Complex a =Complex(1,1)+Complex(5);
cout＜＜a.real()＜＜’+’＜＜a.imag() ＜＜ ’i’ ＜＜endl
return 0;

程序执行后的输出结果是

A．6+6i
B．6+1i
C．1+6i
D．1+1i

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单项选择题

有以下程序 #include ＜iostream＞ using namespace std; static int days []=31,28.31,30,31,30,31,31,30,31,30,31; class date private: int month, day, year: public: date (int m, int d, int y month = m; day = d; year = y; date void disp ) cout ＜＜year＜＜ - ＜＜month＜＜ - ＜＜day＜＜end1; date operator+(int day) date dt = *this: day += dt.day; while day ＞ days[ dt.month - 1 ] ) day -= tays[ dt.month - 1 ]; if ( ++dt.month == 13 dt.month = 1; dt.yeare++; dr. day = day; return dt; ; int main() date d1( 6, 20, 2004 ), d2; d2.= d1 + 20; d2.disp (); return 0; 执行后的输出结果是

A．2004-7-10
B．2004-6-20
C．2004-7-20
D．程序编译时出错

单项选择题

有以下类定义 class Point public: Pointint x = 0, int y=0) _x = x; _y = y; void Move int xoff, int yoff) _x +=xoff;_y+=yoff; void Print() const cout＜＜’(’＜＜_x＜＜’,’＜＜_y＜＜’)’ ＜＜ end1; private: int_x,_y; ; 下列语句中会发生编译错误的是

A．Point pt;pt.Print();
B．const Point pt;pt.Print();
C．Point pt;pt.Move(1, 2);
D．const Point pt;pt.Move(1, 2)

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