有如下程序: #include<iostream) using namespac
题型:单项选择题
问题:
有如下程序:
#include<iostream)
using namespace std;
classBase
public:
Base(int x=0)cout<<x;
;
Class Derived:public Base
public:
Derived(int x=0)cout<<x;
private:
Base Val;
;
int main()
Derived d(1);
return 0;
A) 100
B) 000
C) 010
D) 001