c++中,class C:public A,B和class C:public A,public B有什么区别?

c++中,class C:public A,B和class C:public A,public B有什么区别? c# base的意义public abstract class B { public B(D t) { Console.WriteLine(B); } public void K() { Console.WriteLine(K); } } public class C : B { public C(String class A{ public A(){ System.out.println( String a); } }class B extends A{public B(){System.out.println(String b);}}class C extends B{public C(){System.out.println(String c);}}public class ConstructorTest{ public static void main(Stringargs[]){C #include class A { public: int n; }; class B:virtual public A {}; class C:virtual publ#include class A{ public: int n;};class B:virtual public A {};class C:virtual public A {};class D:public B ,public C{ int getn(){return B::n;}};D d;d.B::n=10;d.C:: 类声明中,指明该类不能有子类的是（） A public B abstract C final D class [code=C#] public class Instance { private class SingletonInstance { private SingletonInstance() { } 度程序,求好心人写出运行结果.写出运行下面的程序后的输出结果#include Using namespace std;class A{public :int n;}class B:virtual public A{ }; class C:virtual public A{ }; class D:public B,public C{ }; inline void print(D&d){ c++public private作用 求大神纠错 C++#include using namespace std;class rectangle{public:rectangle(){cout c++,类的声明 class AA； class BB：public AA{}； AA类在BB中是做什么作用? C++:class C;C 下面哪种情况下,B不能隐式转换为A?A.class B:public A{} B.class A:public B{}C.class B{operator A();} D.class A{A(const B&);} error C2027:use of undefined type 'A' see declaration of 'A#includeusing namespace std;class A;class B{public :B(A * a){a->c = 5;}};class A{public:int c;void set(){B b(this);cout 下面的程序中 public Trangle(double a,double b,double c)能这样定义吗?说清楚点,它又是什么意思?public class Trangle{ double sideA,sideB,sideC; boolean boo; public Trangle(double a,double b,double c) { sideA=a; 下面类的定义中有( c ) 处错误.class myclass{int i=0; public: void myclass( );~myclass(value); } A) 1 B)2 C)3 D)4多个value还有呢 public class Test{ public static void main(String args[]){ int i=1,b,c; int[] a=new int[3]; b=a[i]; A *a=new C; *a那个类的#include using namespace std;class A{public:A(){cout 求一个简单的C的语法class A{ public:A(){};A(int i){};}A a(1);//这是什么用法?