sort_class-1.cpp

#include <bits/stdc++.h>
using namespace std;

class Student {
 public:
  int no;
  string name;
  Student() = default;
  Student(int no, string name) {
    this->no = no;
    this->name = name;
  }

  bool operator<(const Student &other) const { return this->no < other.no; }
};

int main() {
  Student student[3] = {{3, "Terry"}, {1, "Tom"}, {2, "Dickson"}};
  sort(student, student + 3);
  for (int i = 0; i < 3; i++) {
    cout << student[i].no << " " << student[i].name << endl;
  }
}