void DeleteElement if mn size int in std vector student iterator std c

void DeleteElement(){
		if (mn.size() > 1){
		int in = 1;
		std::vector <student> :: iterator i;
		std::cout << "Choose id of student: " << std::endl;
		for (i = mn.begin(); i < mn.end(); i++){
			std::cout << "Id of student number " << in << ": " << (*i).getIdStudent() << std::endl;
			in++;
		}
		int id;
		std::cout << "Enter id of student" << std::endl;
		std::cin >> id;
		id = abs(id);
		for (i = mn.begin(); i < mn.end();){
			if ((*i).getIdStudent() == id)
				i = mn.erase(i);
			else  
				++i;
		}
		}
		else mn.clear();
		
	}