How do i create a struct variable for nested struct in c?

Question

struct stu{
char name;
int clas;
struct date
{
int dates;
};
};
How can i create a struct variables for date inside main ? Like stu date num;
It show error

Answer 1

struct stu {
char name;
int clas;
struct date
{
int dates;
};
};

int main() {
struct stu s, *ps = &s;
s.dates = 74;

printf("%d\n", ps->dates); // 74
return 0;
}

Answer 2

write one of the structure variable in another structure