下列类的定义中,有( )处语法错误。 class Base { public: Base(){} Base(int i) { data=i; } private: int data; }; class Derive : public Base { public: Derive() : Base(O) {} Derive (int x) { d=x; } void setvalue(int i) { data=i; } private: int d; };A.1B.2C.3D.4

下列类的定义中,有( )处语法错误。 class Base { public: Base(){} Base(int i) { data=i; } private: int data; }; class Derive : public Base { public: Derive() : Base(O) {} Derive (int x) { d=x; } void setvalue(int i) { data=i; } private: int d; };

A.1

B.2

C.3

D.4


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下列程序的输出结果是非曲直【 】。includeclass base{ int x, y;public: base(int i, 下列程序的输出结果是非曲直【 】。include<iostream, h>class base{int x, y;public:base(int i, int j){x=i; y=j;}virtual int add(){return x+ y;}};class three: public base{int z;public:three(int i, int j, int k) :base(i, j){z=k; }int add() { return (base:: add()+z); }};void main(){three * q=new three(lO,20,30);cout<<q->add()<<end1;}

在下面的程序的横线处填上适当的语句,使该程序的输出为12。 include using namespace 在下面的程序的横线处填上适当的语句,使该程序的输出为12。include<iostream.h>using namespace std;class Base{public:int a,b;Base(int i){a=i;}};class Derived:public Base{int a;public:Derived(int x):Base(x),b(x+1){};void show(){______;//输出基类数据成员a的值cout<<b<<endl;}};int main(){Derived d(1);d.show();return 0;

下列类的定义中,有( ) 处语法错误。 class Base { public: Base(){} Base(int i) { data=i; } private: int data; }; class Derive: public Base { public: Derive(): Base(O) { } Derive(int x) { d=x; } void setvalue(int i) { data=i; } private: d; };A.1B.2C.3D.4

已知如下类定义: class Base { public Base (){ //... } public Base ( int m ){ //... } protected void fun( int n ){ //... } } public class Child extends Base{ // member methods } 如下哪句可以正确地加入子类中?() A.private void fun( int n ){ //...}B.void fun ( int n ){ //... }C.protected void fun ( int n ) { //... }D.public void fun ( int n ) { //... }

在下面的程序的横线处填上适当的语句,使该程序的输出为12。include 〈iostream〉using namespace std;class Base{public:int a;Base(int i) { a=i;}};class Derived : public Base{int a;public:Derived(int x) : Base(x),b(x+1) {}void show(){【 】; //输出基类数据成员a的值cout〈〈b〈〈end1;}};int main(){Derived d(1);d.show();return 0;}

为完成下面的程序,应在划线处填入的语句是includeusingnamespace std;class Base{pri 为完成下面的程序,应在划线处填入的语句是 #include<iostream> using namespace std; class Base { private: int x; public: Base (int i) { x=i; } ~Base(){} }; class Derived:public Base { public: ______________//完成类Derive构造函数的定义 }; int main() { Derived Obj; return 0; }A.Derived(int i):Base(i){}B.Derived(){}C.void Derived (int i):Base(i){}D.Derived(int i){Base(i);}

有如下程序:includeusing namespace std;class Base{public:Base(int x=0){cout 有如下程序: #include<iostream> using namespace std; class Base{ public: Base(int x=0){cout<<x;} }; class Derived:public Base{ public: Derived(int x=0){cout<<x;} private: Base val; }; int main( ){ Derived d(1); return 0; } 程序的输出结果是A.0B.1C.01D.001

下列程序的输出结果是【 】。includeiostreamusing namespace std;class Base{public:int m,n;Base(int i,int j):m(i),n(j){}};class Derived:public Base{public:int m,k,;Derived(int i,int j):Base(i,j),m(i+1),k(j+1){}};int main(){Derived d(1,5);coutd.md.kd.n;return 0;}

有以下程序 include using namespace std; class Base { int a; public: Base(int x) 有以下程序include <iostream>using namespace std;class Base{int a;public:Base(int x){ a=x; }void show(){ cout<<a; }class Derived : public Base{int b;public:Derived(int i) :Base(i+1),b(i){}void show() { cout<<b;};int main (){Base b(5),*pb;Derived d(1);pb=d;pb->show ();return 0;}运行后的打印结果是______。

有如下程序: include using namespace std class Base{ int b; public: Base(int i) { 有如下程序:include<iostream>using namespace stdclass Base{int b;public:Base(int i) {b=i;}Void disp ( ) {cout<<"Base:b="<<b<<''; }};class Base1:virtual public Base{public:Base1(int i):Base(i){}};class Base2:virtual public Base{public:Base2(int i):Base(i){}};class Derived:public Basepublic Base1{int d;public:Derived(int i ,int j):Base1(j),Base2(j),【 】{ d=i; }void disp() {cout<<"Derived:d="<<d<<' ';}};int main()Derived objD(1,2);objD. disp()objD. Base::disp();objD. Base1::disp()objD. Base2::disp();return 0;}请将程序补充完整,使程序在运行时输出:Derivd:d=1 Base:b=2 Base:b=2 Base:b=2

有如下程序;include using namespace std;class Base{public;Base(inti){x=i;}void d 有如下程序; #include <iostream> using namespace std; class Base { public; Base(inti){x=i;} void dispa0{cout<<x<<',';} private; int x; }; class Derived;public Base { public; Derived(int i);Base(i+10) {x=i;) void dispb(){dispa();cout<<x<<end1;} private; int x; }; int main() { Derived b(2) ; b.dispb(); return 0; } 运行的结果是( )。A.2,2B.12,2C.12,10D.10,2

下面程序的打印结果是【】。 include using namespace std; class Base { public:Base(i 下面程序的打印结果是【 】。include <iostream>using namespace std;class Base{public:Base(int x){a=x;}void show(){cout<<a;}private:int a;};class Derived : public Base{public:Derived(int i) :Base(i+1) ,b(i) { }void show(){cout<<b;}private:int b;};int main ( ){Base b(5) , *pb;Derived d(1);pb=d;pb->show();return 0;}

下面程序段的输出结果是( )。 class Base { int i; Base { add(1); } void add(int v) { i+=v: } void print { System.out.println(i); } } class Extension extends Base { Extension { add(2); } void add(int v) { i+=v*2: } } public class Test { public static void main(String args[]) { bogo(new Extension); } static void bogo(Base b) { add(8); print; } }A.9B.18C.20D.22

有以下程序include using namespace std:class Base{private:char c;public:Base(cha 有以下程序#include <iostream>using namespace std:class Base{private: char c;public: Base(char n) :c(n) {} ~Base ( ) { cout<<c; }}; class Derived : public Base{private: char c;public: Derived(char n):Base (n+1),c(n) {} ~Derived() { cout<<c; }};int main(){ Derived obj('x'); return 0;} 执行后的输出结果是A.xyB.yxC.xD.y

为完成下面的程序,应在划线处填入的语句是()。includeusingnamespacestd;classBase{pr 为完成下面的程序,应在划线处填入的语句是( )。 #include <iostream> using namespace std; class Base { private: int x; public: Base(int i) { x=i; } ~Base(){} }; class Derived : public Base { public: _______________ //完成类Derive构造函数的定义 }; int main() { Derived Obj; return 0; }A.Derived(int i):Base(i){}B.Derived(){}C.voidDerived(int i):Base(0){}D.Derived(int i){Base(i);}

下面程序的运行结果是( )。 #includeiostream.h class base{ protected: int a; public: base{cout”0”;} }; class basel:virtual base{ public: basel{cout”1”;} }; class base2:virtual base i public: base2{cout”2”;} }; class derived:public basel,public base2{ public: derived{cout”3”;} }; void main derived obj; coutendl:A.0123B.3120C.0312D.3012

当你编译运行下列程序代码,会得到什么结果?private class Base{ Base(){ int i = 100; System.out.println(i); } }public class Pri extends Base{ staticint i = 200;public static void main(String argv[]){ Pri p = new Pri(); System.out.println(i); } }A.这段代码不能通过编译B.输出200C.输出100和200D.输出100

有以下程序:inClUdeusingnamespacestd;ClassBase{public: Base(intx) {a=x; } voidsh 有以下程序: #inClUde <iostream> using namespace std; Class Base { public: Base(int x) { a=x; } void show() { cout<<a; } private: int a; }; class Derived : public Base { public: Derived(int i) :Base(i+1),b(i){} void Show() { cout<<b; } private: int b; }; int main() { Base b(5),*pb; Derived d(1); pb=d; pb->show(); return 0; } 运行后的输出结果是( )。A.1B.5C.2D.0

若有以下程序:include using namespace std;class Base{private: int x;protected: i 若有以下程序: #include <iostream> using namespace std; class Base { private: int x; protected: int y; public: int z; void setx(int i) { x=i; int getx () { return x; } }A.1,2,3,4B.产生语法错误C.4,3,2,1D.2,3,4,5

下列类的定义中,有( )处语法错误。 class Base { publiC: Base(){} Base(int i) { data=i; } ptivate: int data; }; class DeriVe:public Base { public: Derive():Base(0){} Derive(int x) { d=x; } void setvalue(int i) { data=i; } private: d; };A.1B.2C.3D.4

有以下程序includeusing namespace std;class Base{private:char c;public:Base(char 有以下程序 #include<iostream> using namespace std; class Base { private: char c; public: Base(char n):c(n){} ~Base() { cout<<c; } }; class Derived:public Base { private: char c; public: Derived(char n):Base(n+1),c(n){} ~Derived() { cout<<c; } }; int main() { Derived obj('x'); return 0; } 执行后的输出结果是A.xyB.yxC.xD.y

在下列的程序的横线处填上适当的语句,使该程序的输出为12。include using namespace 在下列的程序的横线处填上适当的语句,使该程序的输出为12。include<iostream.h>using namespace std;class Base{public:int a,b;Base(int i){a=i;}};class Derived:public Base{int a;public:Derived(int x):Base(x),b(x+1){};void show(){

下列程序的运行结果是______。 include class Base { public: virtual void func(int 下列程序的运行结果是______。include<iostream.h>class Base{public:virtual void func(int i){cout<<"class Base:"<<i<<end1;)};class Derived: public Base{public:void func(double d){cout<<"class Derived:"<<d<<endl;}};void main( ){Base a,*p=a;Derived b;p=b;(*p).func(3.3);}

设有类定义如下:class Base{public Base(int i){}}public class MyOver extends Base{public static void main(String arg[]){MyOver m = new MyOver(10);}MyOver(int i){super(i);}MyOver(String s, int i){this(i);//Here}}以下哪条语句可以安排在//Here处 ?A.MyOver m = new MyOver();B.super();C.this("Hello",10);D.Base b = new Base(10);

以下程序调试结果为:class Base{Base(){int i = 100;System.out.print (i);}}public class Pri extends Base{static int i = 200;public static void main(String argv[]){Pri p = new Pri();System.out.print(i);}} A.编译错误B.200C.100200D.100

下列程序的输出结果是______。 include class base { int x,y; public: base(int i,i 下列程序的输出结果是______。include<iostream.h>class base{int x,y;public:base(int i,int j){x=i;y=j;}virtual int add( ){return x+y;}};class three:public base{int z;public:three(int i,int j,int k):base(i,j){z=k;)int add( ){return(base::add( )+z);}};void main( ){three*q=new three(10,20,30);cout<<q->add( )<<endl;}

在下面横线上填上适当的语句,完成程序。include using namespace std; class Base { in 在下面横线上填上适当的语句,完成程序。include<iostream>using namespace std;class Base{int x;public:Base(int i){x=i;}~Base(){});class Derived:public Base{public:______//完成类Derive构造函数的定义};iht main(){Derived obj