// nested classes - creating a class within a class
class Student{
  double cgpa;
  int student_id;
  String student_name;
  
     Student(int a,String name){
	      student_id=a;
		  student_name=name;
	 }
	 void cal_cgpa(sem_marks s1,sem_marks s2){
	     cgpa= (s1.sgpa+s2.sgpa)/2;
	 }
     void call_sem_marks(){	       
			sem_marks sm1= new sem_marks(1);
			sm1.sgpa=sm1.cal_sgpa(80,90);
			sem_marks sm2= new sem_marks(2);
			sm2.sgpa=sm2.cal_sgpa(90,70);
			cal_cgpa(sm1,sm2);		 
	 }
 
  class sem_marks{
      int sub1;
	  int sub2;
	  double sgpa;
	  int sem;
	  
	  sem_marks(int k){
	   sem = k;
	  }
	  double cal_sgpa(int a,int b){
			return (a+b)/(2*10);
	  }

	}
}

class Example5{
public static void main(String[] arg)
{
 Student s = new Student(101,"Mahesh");
 s.call_sem_marks();
 System.out.print(s.cgpa+" "+s.student_id+" "+s.student_name);
}
}