C++ Programming :: read every other string from a text file


	read every other string from a text file Hi, I am trying to read every other string from a text file and store it in a vector. I can use istream_iterator to read all strings and store it in a vector. However, I only need the first, third,5th etc string in a vector. How do I do this? Thanks a lot. Any help I can get is appreciated aarth@gmail.com wrote: > I am trying to read every other string from a text file and store it > in a vector. I can use istream_iterator to read all strings and store > it in a vector. However, I only need the first, third,5th etc string > in a vector. How do I do this? In a loop, maybe? Like, while the stream is good, read the line, store it, then read one more, throw it out, repeat... V -- Please remove capital 'A's when replying by e-mail I do not respond to top-posted replies, please don't ask Here is the part of the code that I'm not sure how to modify. This reads every word and stores it in the buffer. I need to store only every alternate word and I don't know how to do that void read_file(const string file_name, vector<string>& buffer) { ifstream in_file(file_name.c_str()); if (!in_file) { return; } istream_iterator< string > is(in_file); istream_iterator< string > eof; copy( is, eof, back_inserter(buffer)); - Hide quoted text - } - Hide quoted text - aarth@gmail.com wrote: > Here is the part of the code that I'm not sure how to modify. This > reads every word and stores it in the buffer. I need to store only > every alternate word and I don't know how to do that > void read_file(const string file_name, vector<string>& buffer) > { > ifstream in_file(file_name.c_str()); > if (!in_file) > { > return; > } > istream_iterator< string > is(in_file); > istream_iterator< string > eof; > copy( is, eof, back_inserter(buffer)); Right here 'buffer' contains every word. What if you just remove every other word from it here? You could use another vector, copy only the evenly-indexed elements from 'buffer' to it (in a loop), and then swap them (to return the correct one). > } V -- Please remove capital 'A's when replying by e-mail I do not respond to top-posted replies, please don't ask Thank you! I wasn't quite sure how I would do it, but I figured it out with your help.