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 { int a; public: C():a(3) ㈠ voidshowa(){cout<<a;} }; voidmain() { C c; c.showa(); }
A.1
B.2
C.3
D.程序有错误
[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) {}A.1B.2C.3D.程序有错误
[单选题]下列程序执行结果是()。includeclass A{public:int a;A():a(10){cout<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 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{ 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]下面程序的输出结果是includeclass A{public: A( ) {cout < < "construtA" < < end下面程序的输出结果是 #include<iostream.h> class A { public: A( ) {cout < < "construtA" < < endl;} Virtual~A( ) {cout < < "destructA" < < endl;}}; class B: public A { }; class C:public A {
[单选题]下面程序的结果是includeclass A{public:A( ){cout<<"construtA"<
[单选题]下面程序的运行结果为includeclass A{int num;public:A(int i){num=i;}A(A &a)下面程序的运行结果为 #include<iostream.h> class A { int num; public: A(int i){num=i;} A(A &a) { num = a.num+ +;} void print( ) {cout << num;} }; void main( 0 { A a (1),b (a) ; a.print( ); b
[单选题]下面程序的输出结果是()。includeClass example{int a;public:example(int B.{a=b£«£«下面程序的输出结果是( )。 #include<iostream.h> Class example {int a; public: example(int B.{a=b++;} void print(){a=a+1 cout<<a<<““;} void print()const{cout<<a<<““;} }; void main() {example x(3