假设整型数据占4个字节，指针占4个字节，则类对象实例b所占用的存储空间大小是（） class Base { public: virtual void f1（) { cout ＜＜ "Base::f1（)" ＜＜ endl; } int _base; }; int main（) { Base b; b._base = 1; cout ＜＜ sizeof（b) ＜＜ endl; return 0; }A．4B．8C．12D．16
假设整型数据占4个字节，指针占4个字节，则类对象实例b所占用的存储空间大小是（） class Base { public: virtual void f1（) { cout ＜＜ "Base::f1（)" ＜＜ endl; } int _base; }; int main（) { Base b; b._base = 1; cout ＜＜ sizeof（b) ＜＜ endl; return 0; }
A．4
B．8
C．12
D．16
参考答案和解析
错误
相关考题：
有以下程序: included using namespace std; class Base { public: Base( ) { x=0; } 有以下程序：included＜iostream＞using namespace std;class Base{public:Base( ){x=0;}int x;};class Derived1:virtual public Base{public:Derived1( ){x=10;}};class Derived2:virtual public Base{public:Derived2( ){x=20;}};class Derived: public Derived1,protected Derived2{ };int main( ){Derived obj;cout＜＜obj. x＜＜endl;return 0;}该程序运行后的输出结果是______。
以下程序的执行结果是【】。 include using namespace std; class base { public: virmal 以下程序的执行结果是【 】。include＜iostream＞using namespace std；class base{public：virmal void who(){cout＜＜"Base Class"＜＜endl；)}；class Derivedl:public Base{public：virtual void who(){cout＜＜"Derivedl Class"＜＜endl;}}；class derived2:public Base{public：virtual void who(){cout＜＜"Derived2 Class"＜＜endl；)}；int main(int argc，char*argv[]){base obj1，*P；deliVedl obj2；derived2 obj3；p=obj1； p-＞who()；p=obj2； p-＞who()；p=obj3； p-＞who()；return 0；}
下面程序的运行结果是#includeclass base{protected：int a;public：base（）{ cout ”0”;}class basel：virtual base}public：base 1（）{cout ”1”;}};class base2：virtual base{public：base2（）{cout ”2”;（};class derived：public base1，public base2{public：derived（）{cout ”3”;}};void main（）{derived obj;cout }A．0123B．3120C．0312D．3012
下面程序的运行结果是 include class base{ protected: int a; public: base( ) {c 下面程序的运行结果是#include＜iostream.h＞class base{protected:int a;public:base( ) {cout ＜ ＜ "0";}};class base l: virtual base{public:base l ( ) {cout ＜ ＜"1";}};class base 2: virtual base{public:base2 ( ) {cout ＜ ＜"2";}};class derived: public base 1, public base2{public:derived( ) {cout ＜ ＜ "3";}};void main( ){derive obj;cout ＜ ＜ endl;}A．0123B．3120C．0312D．3012
有以下程序:include using namespace std;class Base{public: Base(){} virtual void 有以下程序： #include ＜iostream＞ using namespace std; class Base { public: Base(){} virtual void f1() { cout＜＜"f1 of base"＜＜end1; } ～Base(){} }; class Derive: public Base { public: void fl(int x) { cout＜＜"f1 of derive"＜＜end1; } }; int main ( ) { Base *p; Derive obj1; p=obj 1; p-＞f1 ( ); return 0; }A．编译时出错B．f1 of deriveC．f1 of baseD．以上答案都不对
有如下程序: include using namespace std; class base { public:virtual void f1(){ 有如下程序： #include＜iostream＞ using namespace std； class base { public： virtual void f1() { cout＜＜"F1Base"; } virtual void f2() { cout＜＜"F2Base "; } }; class derive : public base { void f1 ( ) { cout＜＜"F1Derive"; } void f2( int x ) { cout＜＜"F2 Derive"; } }; int main () { base objl, * p; derive obj2; p = obj2; p -＞ f1(); p -＞ f2(); return 0; } 执行后的输出结果是( )。A．F1Derive F2BaseB．F1Derive F2DeriveC．F1Base F2BaseD．F1Base F2Derive
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
有如下程序:include using namespace std;class Base{ public: void fun() { cout 有如下程序： #include ＜iostream＞ using namespace std; class Base { public: void fun() { cout＜＜"Base::fun"＜＜endl; } }; class Derived : public Base { public: void fun() { ______ cout＜＜"Derived::fun"＜＜endl; } }; int main() { Derived d; d.fun(); return 0; } 已知其执行后的输出结果为： Base::fun Derived::fun 则程序中下划线处应填入的语句是( )。A．Base.fun();B．Base::fun();C．Base-＞fun();D．fun();
下列程序的运行结果是______。include class Base { public: void f(int x){cout 下列程序的运行结果是______。include＜iostream.h＞class Base{public：void f(int x){cout＜＜“Base：”＜＜x＜＜endl；})；class Derived：public Base{public：void f(char*str){cout＜＜“Derived：”＜＜str＜＜endl；}}；void main(void){Base*pd＝ne
下面程序的输出结果是【】。include using namespace std; class base { protected: int 下面程序的输出结果是【 】。include ＜iostream＞using namespace std;class base{protected:int a;public:base(){cout＜＜"0":}};class basel: virtual public base{public:base1(){ cout＜＜"1";}};class base2 : virtual public base{public:base2(){cout＜＜"2";}};class derived : public base1,public base2{public:derived () {cout＜＜"3"; }}int main (){derived obj;cout＜＜end1;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______。
以下程序的执行结果是______。 include class base { public: virtual void who(){c 以下程序的执行结果是______。include＜iostream.h＞class base{public：virtual void who(){cout＜＜"base class"＜＜endl：}}；class derrvel:public base{public：void who(){cout＜＜"derivel class"＜＜endl：}};class derive2；public base{public：void who() {cout＜＜"derive2 class"＜＜endl；}}；void main(){base obj1，*P；derive1 obj2；derive2 obj3：p=obj1；p-＞who()；p=obj2：p-＞who()；p=obj3；p-＞who()；}
将下面程序补充完整。 include using namespace std; class Base{ public: 【 】fun(){r 将下面程序补充完整。include ＜iostream＞using namespace std；class Base{public：【 】 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 【 】 SetVal(int a，int b){x=a；y=b；} //类Derived成员函数void main(){Derived d；cout＜＜d．fun()＜＜endl；}
请阅读下述代码，写出程序执行的结果#include iostreamusing namespace std;class CBase{public:virtual void print(){cout "base" endl;}void DoPrint(){print();}};class CChild1: public CBase{public:virtual void print(){cout "child1" endl;}};class CChild2: pu{public:virtual void pri{cout "chil}};void DoPrint(CB{base-DoPrint}void main(){CBase* base =CChild1* childCChild2* childDoPrint(child1DoPrint(child2DoPrint(base);delete base;base = child1;base-print();delete child1;delete child2;}
使用VC6打开考生文件夹下的工程test8_1，此工程包含一个源程序文件test8_l.cpp，但该程序运行有问题，请改正程序中的错误，使程序的输出结果如下：f1 function of derivef2 function of basef4 function of base源程序文件test8_1.cpp清单如下；include＜iostream.h＞class base{public:／*********found**********／void f1(){cout＜＜"f1 function of base"＜＜endl;}virtual void f2(){cout＜＜"f2 function of base"＜＜endl;)virtual void f3(){cout＜＜"f3 function of base"＜＜endl;)void f4(){cout＜＜"f4 function of base"＜＜endl;)};／*******+*found**********／class derive::public base{void f1(){cout＜＜"f1 function of derive"＜＜endl;)void f2(int X){cout＜＜"f2 function of derive"＜＜endl;)void f4(){cout＜＜"f4 function of derive"＜＜endl;)};void main(){base *p;derive obj2;／******+**found**********／p=obj2;p-＞fl();p-＞f2();p-＞f4();}
有如下程序includeusing namespace std;class base{public:virtual void f1(){cout 有如下程序 #include＜iostream＞ using namespace std； class base { public： virtual void f1() { cout＜＜"F1Base"； } virtual void f2() { cout＜＜"F2Base"； } }； class derive:public base { void f1() { cout＜＜"F1 Derive"； } void f2(int x) { cout＜＜"F2 Derive"； } }； int main() { base obj1，*p； derive obj2； p= obj2; p-＞f1()； p-＞f2(); return ()； ) 执行后的输出结果是( )。A．F1Derive F2BaseB．F1Derive F2DeriveC．F1Base F2BaseD．F1Base F2Derive
以下程序执行结果是 ( )。include class Base{public virtual void fun() {cout 以下程序执行结果是 ( )。 #include ＜iostream.h＞ class Base { public virtual void fun() { cout＜＜"B"; } }; class Derived { public: Derived() { cout＜＜"D"; } virtual void fun(){ Base::fun(); cout＜＜"C"; } } int main () { Base *ptr; Derived obj; ptr=obj; p-＞fun ( ); return 0; }A．DBCB．DCBC．BDCD．CBD
有如下程序include using namespace std;class base{public:virtual void f1(){cout 有如下程序#include ＜iostream＞using namespace std;class base{public: virtual void f1() { cout＜＜"F1Base "; } virtual void f2() { cout＜＜"F2Base "; }};class derive: public base{ void f1() { cout＜＜"F1Derive "; } void f2( int x ) { cout＜＜"F2Derive "; }};int main(){ base obj1, * p; derive obj2; p = obj2; p -＞ f1(); p -＞ f2(); return 0;} 执行后的输出结果是A．F1Derive F2BaseB．F1Derive F2DeriveC．F1Base F2BaseD．F1Base F2Derive
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: void fun() { cout＜＜"Base::fun"＜＜endl; } }; class Derived: public Base { public: void tim() } ____________ cout＜＜"Derived:: fun"＜＜endl; } }; int main() { Derived d; d.fun(); return O; } 已知其执行后的输出结果为： Base::fun Derived::fun 则程序中下划线处应填入的语句是A．Base.fun()；B．Base::fun()；C．Base-＞fun()；D．fun()；
若有以下程序:include using namespace std;class Base{public:Base (){x=0;}int x;} 若有以下程序： #include ＜iostream＞ using namespace std; class Base { public: Base () { x=0; } int x; }; class Derived1 : virtual public Base { public: Derived1 () { x=10; } }; class Derived2 : virtual public Base { public: Derived2 () { x=20; } }; class Derived : public Derived1,protected Derived2{ }; int main() { Derived obi; cout＜＜obj.x＜＜endl; return 0; } 该程序运行后的输出结果是A．20B．30C．10D．0
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： #includeiostream using namespace std； classBase{ public： void fun{ __________________ cout”Base：：fun”endl；} }； class Derived：public Base{ public： voidfun{ cout”Derived：：fun”endl： } }； int main{ Derived d； A fun； return 0； } 已知其执行后的输出结果为： Base：：fun Derived：：fun 则程序中下画线处应填入的语句是（ ）。A. Base．fun；B.Base：：fun；C.Base—fun；D.fun；
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
下面程序的运行结果是includeclass base{protected: int a;public: base(){cout 下面程序的运行结果是 #include＜iostream．h＞ class base{ protected： int a； public: base(){cout ＜＜"0"；} }； class basel：virtual base{ public： basel () {cout ＜＜"1"；} }； class base2：virtual base{ public： base2(){cout ＜＜"2"；} }； class derived：public basel，public base2{ public： derived(){cout ＜＜"3"；} }； void main() { derived obj； cout ＜＜end1； }A．123B．3120C．312D．3012
有如下程序includeusing nameSpace std;class base{public:vinual void f1() { cout 有如下程序 #include＜iostream＞ using nameSpace std； class base { public： vinual void f1() { cout＜＜"F1 Base"； } virtual void f2() { cout＜＜"F2Base"； } }； class derive：public base { void f1() { cout＜＜"F1Derive"； } void f2(int x) { cout＜＜"F2Derive"； } }； int main() { base obj1，*p； derive obj2； p=obj2； p—＞f1()； p—＞f2()； return 0； } 执行后的输出结果是A．F1Derive F2BaseB．F1Derive F2DeriveC．F1Base F2BaseD．F1Base F2Derive
下列程序的输出结果是______。 include using namespace std; class base { public: in 下列程序的输出结果是______。include＜iostream＞using namespace std;class base{public:int n;base(int x){n=x;}virtual void set(int m){n=m;cout＜＜n＜＜'';}};class deriveA:public base{public:deriveA(int x):base(x){}void set(int m){n+=m;cout＜＜n＜＜'';}};class deriveB:public base{public:deriveB(int x):base(x){}void set(int m){n+=m;cout＜＜n＜＜'';}};int main( ){deriveA d1(1);deriveB.d2(3);base*pbase;pbase=d1;pbase-＞set(1);pbase=d2;pbase-＞set(2);return 0;}
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);}
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;}