怎么这么多红线，，可是输出正常呀

#include
#include
#include
using namespace std;

struct a1
{
string name;
int age;
int score;
};

struct st
{
int id;
string name;
int age;
struct a1 z;
};

int main() {

struct st t;
t.id = 10000;
t.name = "老王";
t.age = 50;

t.z.name = "小王";
t.z.age = 20;
t.z.score = 60;

cout << " 老师:" << t.id << " 名字:" << t.name << " 年龄:" << t.age
    << " 小王:" << t.z.name << " 年龄:" << t.z.age << " 分:" << t.z.score << endl;

cout << "__________________________" << endl;
system("date/t"), system("time/t");
return 0;

}

加上

#include <windows.h>