C++ 질의응답

int main() {
 ifstream file1("text1.txt", ios_base::in | ios_base::binary);
 ifstream file2("text2.txt", ios_base::in | ios_base::binary);
 ofstream file3("output.txt", ios_base::out | ios_base::binary);

 file3 << file1.rdbuf() << endl << endl;
 file3 << file2.rdbuf();

 file1.close();
 file2.close();
 file3.close();
}

이렇게 ios::rdbuf 함수를 사용해도 되나요