void cycle_input(ifstream& file, string& filename)
{
	if(!file.eof())
		return;

	file.close();
	file.clear();

	file.open(filename.c_str(), ios::in);

}

void main()
{

	string fin_filename = "1.txt";
	string fim_filename = "2.txt";
	string fib_filename = "3.txt";

	ifstream fin(fin_filename.c_str() ); 
	ifstream fim( fim_filename.c_str() ); 
	ifstream fib( fib_filename.c_str() ); 

	string mlstr; 
	string mainstr; 
	string str_name; 

	do 
	{ 
		getline( fib, str_name ); 

		cycle_input(fin, fin_filename);
		getline( fin, mainstr ); 

		cycle_input(fim, fim_filename);
		getline( fim, mlstr ); 
	} 
	while(!fib.eof());

	system("pause");
}