下列程序执行结果是( )。 #include<iostream.h> class A {public: int a; A():a(10){cout<<a<<endl;} }; void main() { A obj1; A obj2(obj1); cout<<""((obj2.a<<endl; )
A.10 10
B.编译错误缺少拷贝构造函数
C.10随机数
D.随机数随机数
[单选题]下列程序的运行结果是includeclass A{int a;public:A( ){a=0;}A(int aa) { a=aa; c下列程序的运行结果是 #include<iostream.h> class A { int a; public: A( ){a=0;} A(int aa) { a=aa; cout<<a++; } }; void main( ) { A x,y(2),z(3); cout<<end1; }A.0B.23C.34D.25
[单选题]下面程序的结果是includeclass A{int a;public:A( ) :a(1) {}void showa ( ) {cout下面程序的结果是 #include<iostream.h> class A { int a; public: A( ) :a(1) {} void showa ( ) {cout < < a;} }; class B { int a; public: B( ) :a(2) {} void showa( ) {cout < < a;} }; class C: p
[单选题]下面程序的结果是()。includeclass A{int a;public:A():a(1){}void showa(){cout<下面程序的结果是( )。 #include<iostream.h> class A { int a; public: A():a(1){} void showa(){cout<<a;} }; Class B { int a; public: B():a(2){} void showa(){cout<<a;} ); class C:public A,public B
[单选题]下面程序的结果是includeclass A { int a;public: A():a(1){} void showa(){cout<<下面程序的结果是 #include<iostream.h> class A { int a; public: A():a(1){} void showa(){cout<<a;} }; class B { int a; public: B():a(2){} void showa(){cout<<a;} }; class C:public A,public B {
[单选题]下面程序的结果是includeclass A{int a;public:A( ):a(1){}void showa( ){cout<下面程序的结果是 #include<iostream.h> class A { int a; public: A( ):a(1){} void showa( ){cout<<a;} }; class B { int a; public: B( ) :a(2) {}A.1B.2C.3D.程序有错误
[单选题]下列程序的执行结果是()。 includeclass Sample{ int x,y; public: Sample() {x=y=0下列程序的执行结果是( )。 #include<iostream.h> class Sample { int x,y; public: Sample() {x=y=0;} Sample(int a,int b) {x=a;y=b;} ~Sample() { if(x==y) cout<<"x=y"<<end1; else cout<<"x!=y"<<end
[单选题]下列程序的执行结果是()。includeclass Sample{int x,y;public:Sample(){x=y=0;)Sam下列程序的执行结果是( )。 #include<iostream.h> class Sample { int x,y; public: Sample(){x=y=0;) Sample(int a,int b){x=a;y=b;} ~Sample() { if=(x==y) cout<<“x=y”<<endl; else cout<<“x!=y”<<endl; }
[单选题]下列程序执行结果是 include class A { public: int a; A( ):a(10){tout<下列程序执行结果是#include<iostream.h>class A{ public:int a;A.( ):a(10){tout<<a<<endl;}};void main( ){ A obj1;A. obj2(obj1);cout<<" "<<obj2.a<<endl;}A.10 10B.编译错误缺少拷贝构造函数C.10 随机数D.随机数随机数
[单选题]下面程序的结果是 ______。includeclass A{ public:virtual voidfun()=0{};};class下面程序的结果是 ______。 #include<iostream.h> class A{ public: virtual void fun()=0{}; }; class B:public A{ public: void fun () {cout<< "new file" ;} }; class C: public A{ public: void fun
[单选题]下列程序的运行结果是()。includeclass A{inta;public:A( ){a=0;}A(int aa){a=aa;co下列程序的运行结果是( )。 #include<iostream.h> class A { inta; public: A( ){a=0; } A(int aa) { a=aa; cout<<a++; } }; void main() { A x,y (2),z (3): cout<<endl; }A.0B.23C.34D.25