eof() changing behaviour?

[jorgen]

I'm using ifstream to read data from a file, with eof() to see when I'm at the end of it (and in the example below writing double data to screen). I've been using it in the following way for a while:

int main() {

	ifstream infile;
	infile.open("file.dat");
	double d;
	infile >> d;
	while(!infile.eof()) {
		cout << d << endl;
		infile >> d;
	}
	infile.close();
	
	return 0;
}

And it has worked perfectly. Now however, it suddenly decides to ignore the last data in the file. If I change it to

int main() {

	ifstream infile;
	infile.open("file.dat");
	double d;
	while(!infile.eof()) {
		infile >> d;
		cout << d << endl;
	}
	infile.close();
	
	return 0;
}

it works fine, but I thought this was supposed to be wrong (reading the last data twice). I'm uncomfortable with switching to the last method in case it suddenly works the normal way again... ideas?

[ne555]

That will be dependant if your file ends with a line break.
Use this instead while( infile>>d )

[jorgen]

And it works, thanks!