C++ sort排序

#include 
#include 
using namespace std;

class Student{
	public:
		string name;
		int number;
		Student(string na, int num);
};

Student::Student(string na, int num){
	name = na;
	number = num;
}

bool cmp(const Student& s1, const Student& s2){
	return s1.number <= s2.number;
}

int main(){
	Student students[] = {
		Student("aaa", 5), 
		Student("ccc", 1),
		Student("fff", 3),
		Student("bbb", 2)};
	sort(students, students+4, cmp);
	
	for (auto elem : students){
		cout << elem.name << " " << elem.number << endl;
	}
	return 0;
}