有如下程序: include using namespace std; class Base { private: 有如下程序: #include<iostream> using namespace std; class Base { private: void funl()const {cout<<"funl";} protected: void fun2() const{cout<<"fun2";} public; void fun3() const {cout<<"fun3";} }; class Derived:protected Base { public; void fun4() const {cout<<"fun4";} }; int main() { Derived obj; obj.funl(); //① obj.fun2(); //② obj.fun3(); //③ obj.fun4(): //④ return 0; } 其中有语法错误的语句是A.①②③④B.①②③C.②③④D.①④
有如下程序: include using namespace std; class Base { private:
有如下程序: #include<iostream> using namespace std; class Base { private: void funl()const {cout<<"funl";} protected: void fun2() const{cout<<"fun2";} public; void fun3() const {cout<<"fun3";} }; class Derived:protected Base { public; void fun4() const {cout<<"fun4";} }; int main() { Derived obj; obj.funl(); //① obj.fun2(); //② obj.fun3(); //③ obj.fun4(): //④ return 0; } 其中有语法错误的语句是
A.①②③④
B.①②③
C.②③④
D.①④
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有如下程序:#includeusing namespace std;class Base{private:void funl() const{cout"funl";}protected:void fun2() const{cout"fun2";}public:void fun3() const{cout"fun3";}};class Derived:protected Base{public:void fun4() const{cout"fun4";}};int main(){Derived obj;obj.funl(); // ①obj.fun2(); // ②obj.fun3(); // ③obj.fun4(); // ④return 0;}其中有语法错误的语句是A . ①②③④B . ①②③C . ②③④D . ①④
有如下程序 include using namespace std; class Base { protected: 有如下程序 #include <iostream> using namespace std; class Base { protected: Base( ){cout<<'A'; } Base(char c) { cout<<c; } }; class Derived: public Base { public: Derived(char c){ cout<<c; } }; int main( ){ Derived d1 ('B'); return 0; } 执行这个程序屏幕上将显示输出A.BB.BAC.ABD.BB
有如下程序: include using namespace std; class Monitor{ public: Monitor(cha 有如下程序:include<iostream>using namespace std;class Monitor{public:Monitor(char t):type(t){ }void Print( )const{cout<<"The type of monitor is"<<type private:char type;};class Computer{public:Computer(int i,char C) :______{}void Print( )const{eout<<"The computer is"<<id<<endl;mort.Print( );}private:int id;Monitor mon;};int main( ){const Computer myComputer(101,'B');myComputer.Print( );return 0;}请将程序补充完整,使程序在运行时输出:The computer is 101The type of monitor is B
有如下程序: include using namespace std; class Base { public: 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.1D.1
有如下程序:includeusing namespace std;Class TestClass{private:int x,y;public:Te 有如下程序: #include<iostream> using namespace std; Class TestClass { private: int x,y; public: TestClass(int i,int j) { x=i; y=j; } void print() { cout<<“print1”<<endl; } void print()const { cout<<”prinA.printlB.print2C.printl print2D.程序编译时出错。
有如下程序:includeusing namespace std;Class Base{public:Base(){cout 有如下程序: #include<iostream.h> using namespace std; Class Base { public: Base(){cout<<“BB”;f();} void{(){cout<<“BF”;} }; class Derived:public Base { public: Derived(){cout<<“DD”;} void f(){cout<<“Df”;) }; int mainA.BBBfDDB.BBDfDDDfC.DDD.DDBBBf
有如下程序:includeusing namespace std;class MyClass{public:MyClass(int x):val(x 有如下程序: #include<iostream> using namespace std; class MyClass{ public: MyClass(int x):val(x){} void Print()const{cout<<“const:val=”<<<val<<‘\’;} void Print(){cout<<“val=”<<val<<‘t’;} private: int va1; }; int main(){ consA.val=10 const:val=20B.const:val=10 const:val=20C.const:val=10 val=20D.val=10 val=20
以下程序的执行结果为______。include using namespace std; class base { public: vir 以下程序的执行结果为______。include<iostream>using namespace std;class base{public:virtual void who(){cout<<"base class"<<endl;}};class derivel:public base{public:void who(){cout<<"d
有如下程序:include using namespace std;class Base{public:Base(){cout 有如下程序:#include <iostream>using namespace std;class Base{ public: Base(){cout<<"BB"; f(); } Void f(){cout<<"Bf"; }};class Derived: public Base{ public: Derived() { cout<<"DD"; } void f() { cout<<"Df"; }};int main() { Derived d; return 0; }执行上面的程序将输出( )。A.BBBfDDB.BBDfDDDfC.DDD.DDBBBf
有如下程序: include using namespace std; class BASE { public 有如下程序: #include<iostream> using namespace std; class BASE { public: ~BASE(){cout<<"BASE";} }; class DERIVED:public BASE { public: ~DERIVED(){cout<<"DERIVED";} }; int main(){DERIVEDx;retum 0;} 执行后的输出结果是A.BASEB.DERIVEDC.BASEDERIVEDD.DERIVEDBASE
有如下程序:includeusing namespace std;class Base{protected:Base(){cout 有如下程序: #include<iostream> using namespace std; class Base{ protected: Base(){cout<<'Base';} Base(char c){cout<<c;} }; class Derived:public Base{ public: Derived(char c){cout<<c;} }; int main(){ Derived d('Derived'); return 0; } 执行这个程序屏幕上将显示输出( )。A.DerivedB.DerivedBaseC.BaseDerivedD.DerivedDerived
如下程序的输出是includeusing namespace std;class Base{public:Base( ){cout 如下程序的输出是 #include<iostream> using namespace std; class Base{ public: Base( ){cout<<"BB";f( );} void f( ){cout<<"Bf";} }; class Derived:public Base{ public: Derived( ){eout<<"DD";} void f( ){cout<<"Df";} }; int main( ){Derived d;return 0;}A.BBBff)DB.BBDfDDDfC.DDD.DDBBBf
有如下程序:includeusing namespace std;class B{public:virtual void show( ){cout 有如下程序: #include<iostream> using namespace std; class B{ public: virtual void show( ){cout<<"B";} }; class D:public B{ public: void show( ){cout<<"D";} }; void funl(B*ptr){ptr->show( );} void fun2(Bref);ref.show( );} void fun3(B b){b.show( );} int nlain( ){ B b,*P=Dew D; D d; funl(p); fun2(b); fun3(d); return 0; } 程序的输出结果是A.BBBB.BBDC.DBBD.DBD
有如下程序:include using namespace std;class Base{public:Base(){ cout 有如下程序: #include <iostream.h> using namespace std; class Base { public: Base(){ cout<<"BB"; f(); } voidf(){cout <<"Bf"; } }; class Derived: public Base { public: Derived (){cout<<"DD";} void f(){cout<<"Df";} }; int main(){Derived d; return 0;} 执行上面的程序将输出A.BBBfDDB.BBDfDDDfC.DDD.DDBBBf
有如下程序:include using namespace std;class BASE{public:~BASE(){cout 有如下程序: #include <iostream> using namespace std; class BASE{ public: ~BASE(){cout<<"BASE";} }; class DERIVED:public BASE{ public: ~DERIVED(){cout<<"DERIVED";} }; int main(){DERIVED x;return 0;} 执行后的输出结果是A.BASEB.DERIVEDC.BASEDERIVEDD.DERIVEDBASE
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;}
有如下程序:include using namespace std;class AA{public: virtual void f() {cout 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"; } }; claA.AAB.AABBCCC.BBAABBCCD.BBBBAACC
有以下程序:include include using namespace std;class base{private: cha 有以下程序: #include <iostream> #include <string> using namespace std; class base { private: char baseName[10]; public: base ( ) { strcpy (baseName, "Base"); } virtual char *myName() {A.DerivedBaseB.BaseBaseC.DerivedDerivedD.BaseDerived
有以下程序:includeusing namespace std;class BASE{private: char c;public: BASE(c 有以下程序: #include <iostream> using namespace std; class BASE { private: char c; public: BASE(char n):c(n);{} virtual~BASE() { cout<<c; } }; class DERIVED:public BASE { char c; pA.XYB.YXC.XD.Y
有如下程序:include using namespace std;class Base{private:charc;public:Base(cha 有如下程序:#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;}执行上面的程序净输出A.xyB.yxC.xD.y
有下列程序: include using namespace std; class Base { public: Base(){cout 有下列程序: #include<iosteram.h> using namespace std; class Base { public: Base(){cout<<"BB"; f(); } void f(){cout<<"Bf";} }; class Derived:public Base { public: Derived(){cout<<"DA.BBBfDDB.BBDfDDDfC.DDD.DDBBBf
有如下程序:includeusing namespace std;class B{public:Virtual void show(){cout 有如下程序: #include<iostream> using namespace std; class B{ public: Virtual void show(){cout<<“B”;} }; class D:publicB{ public: void show(){cout<<“D”;} }; void funl(B*ptr){ptr->show();} void{un2(Bref){ref.show();} voidA.BBBB.BBDC.DBBD.DBD
有如下程序:nclude using namespace std;class Base{public:void fun1() {cout 有如下程序:#nclude <iostream>using namespace std;class Base{ public:void fun1() {cout << "Base\n"; }virtual void fun2() {cout << "Base\n"; }};class Derived: public Base{ public:void fun1() {cout << "Derived\n"; }void fun2() {cout << "Derived\n"; }} void f(Base b) { B. fun1(); B. fun2(); }int main(){Derived obj;f(obj);return 0;}A.Base BaseB.Base DerivedC.Derived BaseD.Derived Derived
有如下程序includeusing namespace std;class Base{protected:Base(){cout 有如下程序 #include<iostream> using namespace std; class Base{ protected: Base(){cout<<'A';} Base(char c){cout<<c;) }; class Derived: public Base{ public: Derived(char c){cout<<c;) }; int main(){ Derived dl('B'); return 0; } 执行这个程序屏幕上将显示输出( )。A.BB.BAC.ABD.BB
有如下程序: #includeiostream using namespace std; class Base { private: void funlconst{tout”funl”;} protected: void fun2const{tout”fun2”;} public: void fun3const{cout”fhll3”;} }; class Derived:protected Base { public: void fhn4const{cout”filn4”;} }; int main { Derived obj; obj.funl;//① obj.fun2;//② obj.furd;//③ obj.fun4;//④ return U: } 其中有语法错误的语句是( )。A.①②③④B.①②③C.②③④D.①④
请在如下程序中的空格处填写正确的语句: include using namespace std; class Base { 请在如下程序中的空格处填写正确的语句:include <iostream>using namespace std;class Base {public:void fun() {cout<<"Base fun"<<endl; }};class Derived: public Base {public:void fun() {【 】; //调用基类的函数fun()cout<<"Derived fun "<<endl;}};