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下面程序的结果是 #include<iostream.h> class A { public: A(){cout<<"construtA" <<endl;} virtual ~A() {cout << "destructA" <<endl;}}; class B:public A { }; class C:public A { }; class D:public B,public C { }; void main() { Dd;}
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下面程序的结果是 #include<iostream.h> class A { public: A(){cout<<"construtA" <<endl;} virtual ~A() {cout << "destructA" <<endl;}}; class B:public A { }; class C:public A { }; class D:public B,public C { }; void main() { Dd;}
A、仅纵筋达到屈服强度
时间:2021-07-17 20:19
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下面程序的运算结果是( )。 #include<iostream> using namespace std; class A { public: virtual void fun()=0; }; class B:public A } public: void fun() {cout<<"new file"<<" ";} }; class C:public A { public: void fun() { cout<<"open file"<<" ";} }; void main() { A a, * p; B b;C c; p=&c; p->fun(); p=&b; }
下面程序的执行结果为 #includ"iostream" using namespace std; class A { int a; public: void Seta(int x){a=x;} void Display_a(){cout<<a<<endl;} }; class B { int b; public: void Setb(int x){b=x;} void
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; pu
下面程序的运行结果为( )。 #include <iostream> using namespace std; class A{ public: A(){cout<<" ";} ~A(){cout<<" ";} } class B:public A{ public: B(){cout<<" ";} ~B(){cout<<" ";} } void main(){ B b; }
下面程序的运行结果为 #include<iostream.h> class A { public: A( ){cout<<"1";} ~A( ){cout<<"2";} }; class B:public A { public: B( ){cout<"3";} ~B( ){cout<<"4";} }; void main( ) { B
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下面程序的运行结果为 #include<iostream,h> class A { public: A(){cout<<"1";} ~A(){cout<<"2";} }; Class B:public A { public: B(){cout<<"3";} ~B(){cout<<"4";} }; void main() { B b; }
下面程序的结果是 #include<iostream.h> class A { public: A(){cout<<"construtA" <<endl;} virtual ~A() {cout << "destructA" <<endl;}}; class B:public A { }; class C:public A { }; class D:public B,public C { }; void main() { Dd;}
下面程序的运算结果是( )。 #include<iostream> using namespace std; class A { public: virtual void fun()=0; }; class B:public A } public: void fun() {cout<<"new file"<<" ";} }; class C:public A { public: void fun() { cout<<"open file"<<" ";} }; void main() { A a, * p; B b;C c; p=&c; p->fun(); p=&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); Const example y(2); x.print();
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);
下面程序的执行结果为 #includ"iostream" using namespace std; class A { int a; public: void Seta(int x){a=x;} void Display_a(){cout<<a<<endl;} }; class B { int b; public: void Setb(int x){b=x;} void
若有以下程序: #include <iostream> using namespace std; class A { protected: int a; public: A() { a=10; } }; class A1 : public A { public: A1() { a=a+1; } }; class A2 : public A { public: A2 () { a=a+2; } }; class B : public A1,public A2 { public: B(){} void print() { cout<<a<<end1; } }; int main ( ) { B obj; obj.print(); return 0; } 程序运行后的输出结果是( )。
下面程序的结果是 #include<iostream.h> class A { public: A(){cout<<"construtA" <<endl;} virtual ~A() {cout << "destructA" <<endl;}}; class B:public A { }; class C:public A { }; class D:public B,public C { }; void main() { Dd;}
有如下程序: #include <iostream.h> class x { protected: int a; public: x() { a=1; } }; class x1 : virtual public x { public: x1() { a+=1; cout<<a; } }; class x2 : virtual public x { public: x2() { a+=2; cout<<a; } }; class y : public xl,public x2 { public: y() { cout<<a<<end1; } }; int main() { y obj; return O; } 该程序运行后的输出结果是( )。
下面程序输出的结果是( )。 #include<iostream> using namespace std; class A{ int X; public: A(int x):x(++x){} ~A(){cout<<x;} }; class B:public A{ int y; public: B(int y):A(y),y(y){} ~B(){cout<<y;}; }; void main(){ B b(3); }
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