更多"将下面程序补充完整。 #include <iostream> us"的相关试题:
[填空题]将下面程序补充完整。
#include <iostream>
using namespace std;
class Base{
public:
【14】 fun( ){return 0;} //声明虚函数
};
class Derived:public Base{
public:
x,y;
void SetVal(int a,int b){}
int fun( ){return x+y;}
};
void 【15】 SetVal(int a,int b){x=a;y=b;} //类Derived成员函数
void main( ){
Derived d;
cout<<d.fun( )<<endl;
}
[单项选择]有以下程序
#include<iostream>
using namespace std;
class Complex
{
public:
Complex(double r=O,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);}
private:
double re,im;
};
int main( )
{
Complex a=Complex(1,1)+Complex (5);
cout<<a.real( )<<’’+’’<<a.imag( )<<’’i’’<<endl;
retum 0;
}
程序执行后的输出结果是【 】
A. 6+6i
B. 6+1i
C. 1+6i
D. 1+1i
[单项选择]有以下程序
#include<iostream>
using namespace std;
class MyClass
{
public:
MyClass(intn) {number=n;}
//拷贝构造函数
MyClass (MyClass& other) {number=other.number;}
~MyClass( ){}
private:
int number;
};
MyClass fun (MyClass p)
{
MyClass temp(p);
return temp;
}
intmain( )
{
MyClass obj1(10),obj2(0);
MyClass obj3(obj1);
obj2=fun(obj3);
return0;
}
程序执行时,MyClass类的拷贝构造函数被调用的次数是【 】
A. 5
B. 4
C. 3
D. 2
[单项选择]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
[填空题]有以下程序
#include <iostream >
using namespace std;
int main( )
{
int i=010,j=10;
cout<<(++i)<<","<<j--<<end1;
return 0;
}
则该程序运行后的输出结果是 【6】 。
[填空题]有如下程序:
#include <iostream>
using namespace std;
class AA
{
public:
virtual void f( )
{
cout<<"AA";
}
};
class BB : public AA
{
public:
BB( )
{
cout<<"BB":
}
};
class CC : public BB
{
public:
virtual void f( )
{
BB::f( ):
cout<<"CC";
}
};
int main ( )
{
AA aa,*p; BB bb; CC cc;
p=&cc;
p->f( );
return 0;
}
运行后的输出结果______。