单项选择题
有如下程序：
#include
#include
using namespace std;
class Person{
public:
Person(string n):name(n) { cout<<’P’; }
private:
string name;
};
class Date{
public:
Date(int y=2012,int m=12,int d=21):year(y),month(m),day(d) { cout<<’D’; }
private:
int year,month,day;
};
class Student:public Person{
public:
Student(string n,int y,int m,int d,char c)
:birthday(y,m,d),sex(c),Person(n) { cout<<’S’; }
private:
Date birthday;
char sex;
};
int main(){
Student stu1("Zhang",1990,10,1,’F’);
return 0;
}
运行时的输出结果是
A．S
B．PS
C．DPS
D．PDS