更多"有下列程序,在横线添加; #include<iostream> u"的相关试题:
[单项选择]有下列程序,在横线添加;
#include<iostream>
using namespace std;
class TestClass
public:
TestClass(int n)number=n;
______//拷贝构造函数
~TestClass( )
private:
int number;
;
TestClass fun(TestClass p)
TestClass temp(P);
return temp;
int main( )
TestClsss obj1(10),obj2(0);
TestClass obj3(obj1);
obj2=fun(obj3);
return 0;
A. TestClass(TestClass &other)number=other.number;
B. TestClass(TestClass other)number=other.number;
C. TestClass(TestClass &other)number;
D. TestClass(&other)number=other.number;
[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】 。
[单项选择]有如下程序: #include<iostream> using namespace std; class Base { protected: in i; public: int j; }; class Derived:public Base { int m; public:int n; }; int main( ) { Derived d; d.i=0; //[1] d.j=0; //[2] d.m=0; //[3] d.n=0; //[4] retum 0; } 其中主函数中有两个赋值语句有错,这两个借误的赋值语句是
A. [1]和[2]
B. [1]和[3]
C. [2]和[3]
D. [2]和[4]
[单项选择]有以下程序
#include <iostream>
using namespace std;
class MyClass
public:
MyClass(int n) 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;
int main( )
MyClass obj1(10), obj2(0);
MyClass obj3(obj 1);
obj2=fun(obj3);
return 0;
程序执行时,MyClass 类的拷贝构造函数被调用的次数是______ 次。
A. 5
B. 4
C. 3
D. 2
[单项选择]若有以下程序
#include <iostream>
using namespace std;
class A
private:
int a;
public:
A(int i)
a=i;
void disp( )
cout<<a<<",";
;
class B
private:
int b;
public:
B(int j)
b=j;
void disp( )
cout<<b<<",";
;
class C: public B,public A
private:
int c;
public:
C(int k):A(k-2),B(k+2)
c=k;
void disp( )
A::disp( );
B::disp( );
cout<<c<<end1;
;
int main( )
C obj(10);
obj.disp( );
return 0;
程序执行后的输出结果是
A. 10,10,10
B. 10,12,14
C. 8,10,12
D. 8,12,10
[单项选择]若有以下程序
#include <iostream>
using namespace std;
class A
public:
A(int i,int j)
a=i;
b=j;
void move(int x,int y)
a+=x;
b+=y;
void show( )
cout<<a<<","<<b<<end1;
private
int a,b;
;
class B: private A
public:
B(int i,int j):A(i,j)
void fun( )
move(3,5);
void fl( )
A::show( );
int main( )
B d(3,4);
d. fun( );
d.fl( );
return 0;
程序执行后的输出结果是
A. 3,4
B. 6,8
C. 6,9
D. 4,3