有如下程序:
#include<iostream>
using namespace std;
class Part{
public:
Part(int x=0):val(x){cout<<val;}
~Part(){cout<<val;}
private:
int val;
};
class Whole{
public:
Whole(int x,int y,intz=0):p2(x),p1(y),val(z){cout<<val;}
~Whole(){cout<<val;}
private:
Part p1,p2;
int val;
};
int main(){
Whole obj(1,2,3);
return 0;
}
程序输出的结果是(B)。
A.123321
B.213312
C.213
D.1231213