有如下程序: #include<iostream> using namesp
题型:单项选择题
问题:
有如下程序:
#include<iostream>
using namespace std;
class Base
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;
程序的输出结果是
A.0
B.1
C.01
D.001