下面代码的输出是（ ）。

#include <iostream>
using namespace std;

struct STU {
    char name[20];
    int age;
    char sex;
    char num[20];
};
int main() {
    struct STU stu[5] = {{"小红", 6, 'F', "xt1666"},
                         {"小明", 9, 'M', "xt1888"},
                         {"小王", 7, 'F', "xt1999"}};
    struct STU *p = stu;
    cout << (p + 2)->age << " " << (p + 2)->num;
    return 0;
}

{{ select(1) }}

• 9 x
• 9 xt1888
• 7 x
• 7 xt1999