Question

I’m trying to read from a file, but the only thing I get on working is using getline().

The problem is that reading a whole line doesnt to the job for me.

My input file looks like this:

abc 10 20
bbb 10        30
ddd 40 20

when the first word in each line should be saved as a string, and both number afterwards as ints.
The delimiter between the “words” in each line can be either a SPACE or a TAB.

So is the only solution is reading char by char? Or is there another solution?

Answer 1

Supposedly you want something like this:

std::string s;
int         v0, v1;
while (in >> s >> v0 >> v1) {
    std::cout << "do something with s='" << s << "' v0=" << v0 << " v1=" << v1 << "\n";
}

This doesn’t make sure that the values are all on one line, however. If you want to arrange for this you probably want to read a line using std::getline() and then split this line up as above using an std::istringstream.