有如下程序:
#include <iostream>
using namespace std;
class Baseprivate:
char c;
public:
Base(char n) :c(n)
~Base()
cout<<c;
;
class Derived: public Baseprivate:
char c; public:
Derived(char n):Base(n+1),c(n)
~Derived()
cout<<c;
;
int main () Derived obj (’x’);
return 0;执行上面的程序净输出
A.xy
B.yx
C.x
D.y