有如下程序:
#include<iostream>
using namespace std;
class Base
int x;
public:
Base(int n=0):x(n)cout<<n;
int getX()constreturn x;
;
class Derived:public Base
mt y;
public:
Derived(int m,int n):y(m),Base(n)cout<<m;
Derived(int m):y(m)cout<<m;
;
int main()
Derived d1(3),d2(5,7);
return 0;
执行这个程序的输出结果是______。
A.375
B.357
C.0375
D.0357