#include <iostream.h>

// you want to assign a unique id number to each student in a class
// in this case if we don't know the number of students in the class apriori
// then we can create an array on the fly to accommodate this. 

int main(void) {

    int number;  // this is the number of students
   cout << "enter the number of students in the class " << endl;
   cin >> number;

   int *student_id =  new int[number+1];  // dynamic allocation
   student_id [0] = 10393430;
   student_id [1] = 5465454;
   //etc. etc..
  
   delete [] student_id;  // finally de-allocate memory 

    return 0;
}