getline delimiter + move to next line?

blizunt7 · 07-06-2005, 08:31 PM

Hey all,
First problem. I have a file, which i have declared:

Code:

 ofstream fout
  fout.open("filename",ios::app);
  assert (!fout.fail());

i have done this so i can add data to the file. However i need to read data from the file first using getline and then write to the file. HOw can i read from the file with ofstream?????

second:
I would like to use getline with a delimiter of ":" to read from this file.
Myfile looks like:

Code:

4000:name:data:otherstuff

However. after i read to the first delimiter from the getline, i want to jump to the next line and skip the rest of the first line. Is this possible??

THank you very much.
Josh

jtshaw · 07-08-2005, 06:32 AM

Ok... I'm a little rusty on common i/o here... but I'm pretty sure you want an fstream object for that file and not an ofstream object. ofstream is going to be write only.

Once you have read in a line, I'd throw it in a stl::string and use the methods stl::string has to easily parse through and get what you want... any questions on how to do this?

blizunt7 · 07-08-2005, 03:38 PM

ohh thanks, ill try the fstream, didnt think of that.

I have never heard of stl::string... nor do i completly understand how you think i can use it...
Can you please give me an example.

If i have a text file that i will use fstream to read and write from such as this

Code:

number:data:name:address
number:data:name:address
....
.....

I want to be able to read to a certain delimiter (namely ":") get that data, and jump to the next line, and do the same.

Thanks so much!!!!!

josh

nadroj · 07-09-2005, 12:08 AM

this is what i found
very straightforward on how to use it (the delimiter bit)