下面程序输出结果是什么?
#include<iostream>
using namespace std;
class A{
public:
A(char *s)
{
cout<<s<<endl;
}
~A(){}
};
class B:virtual public A
{
public:
B(char *s1,char*s2):A(s1){
cout<<s2<<endl;
}
};
class C:virtual public A
{
public:
C(char *s1,char*s2):A(s1){
cout<<s2<<endl;
}
};
class D:public B,public C
{
public:
D(char *s1,char *s2,char *s3,char *s4):B(s1,s2),C(s1,s3),A(s1)
{
cout<<s4<<endl;
}
};
int main() {
D *p=new D("class A","class B","class C","class D");
delete p;
return 0;
}
