List<T>::find' : cannot convert parameter 1 from 'Student' to 'int'

bool InsertResult(char *filename, List<Student> *list)
{
	Student stu;
	Exam exam;

	bool read=true;
	char stuid[10];

	ifstream in; 
	in.open(filename);

	if(!in){
		cout << "The file cannot open." << endl;
		read = false; //set the read to false when the file not found
	}
	
	while(!in.eof())
	{	
		int check=1;
		in >> stuid;

		for(int i=1; i<=list->size(); i++)
		{
			list->get(i,stu);
			if(strcmp(stu.id,stuid) == 0)
			{	
				check = 0;
				break;
			}
		}

		in >> exam.trimester;
		in >> exam.year;
		in >> exam.numOfSubjects;

		for(int i=0;i<exam.numofsubjects;i++)>
		{
			in>>exam.sub[i].subject_code;
			in>>exam.sub[i].subject_name;
			in>>exam.sub[i].credit_hours;
			in>>exam.sub[i].marks;
		}

//////////////////////////////////Problem in here /////////////////////////////////
		if (check==0)
		{
			if(list->find(stu)->item.exam->empty())
			{
			list->find(stu)->item.exam = new List<exam>;
				list->find(stu)->item.exam->insert(exam);
			}	
			else
				list->find(stu)->item.exam->insert(exam);						
		}
	
////////////////////////////////////////////////////////////////////////////////
		for(int i=1; i<=list->size(); i++)
		{
			list->get(i,stu);
			if(strcmp(stu.id,stuid) == 0)
			{	
				exam.calculateGPA();
				stu.calculateCurrentCGPA();
				list->set(i,stu); 
				cout << stu;
			} 
				//cout << exam;

		}
	}
	in.close();
	cout << "\n\t Student results are successfully inserted.\n";
	return true;

}