各位大佬，这个程序哪错了
#include<iostream>
#include<cstring>
using namespace std;
class Student
{
private:
int num;
char name[20];
char sex;
public:
void set_date(int n, char *p, char s)
{
num = n;
strcpy(name,p);
sex = s;
}
void display()
{
cout << "num:" << num << '\n';
cout << "name:" << name << '\n';
cout << "sex:" << sex <<'\n';
}
};

int main()
{
Student stud1, stud2;
stud1.set_date(1, "She", 'f');
stud2.set_date(2, "He", 'm');
stud1.display();
stud2.display();
return 0;
}