Read lines from a file in C++

lines.cc

// <iostream> and <fstream> have been included

void lines() {
	ifstream in_file;
	in_file.open("input.txt");
	string line;

	while (in_file.getline(line, 256)) {
		cout << "line: \"" << line << "\"\n";
	}

	in_file.close();
}