The snippet below reads three integers from std::cin; it writes two into numbers and discards the third: std::vector<int> numbers(2); copy_n(std::istream_iterator<int>(std::cin), 2, nu...

I have an istream and need to copy the content between two delimiters to a std::string. I can find the delimiters' streampos, but when trying to use istream_iterator<char> to iterate over the...

The purpose of my program is to open a text file of m lines of the same length n, read the file column by column and print each column. For example, for this text file abcd efgh jklm I would...

Given a file containing the following hex code: 0B 00 00 00 00 00 20 41 I'm trying to populate an std::vector <std::uint8_t> and then checking each byte manually. Here's the code where I ...

N2976 suggested adding constexpr to some spots in the standard library. It notes that iostreams are inappropriate for constexpr EXCEPT end iterators. So istream_iterator and istreambuf_iterator wer...

Can anyone tell me why the below piece of code I wrote when compiling keeps complaining istream_iterator is not a member of std please can you tell? Thanks guys #include <cstdlib> #include ...

I want to be able to solve problems like this: Getting std :: ifstream to handle LF, CR, and CRLF? where an istream needs to be tokenized by a complex delimiter; such that the only way to tokenize ...

If I want to calculate the sum of a bunch of numbers retrieved from an std::istream, I can do the following: // std::istream & is = ... int total = std::accumulate(std::istream_iterator<int...

For copying what I read from input file to vector, I used std::copy() as recommended in Reading an std::ifstream to a vector of lines. The problem occurs if I use: std::copy(std::istream_iterato...

In the book “Effective STL” by Scott Meyers, there is a nice example of reading an entire text file into a std::string object: std::string sData; /*** Open the file for reading, binary mode ***/...

I have code like this std::ifstream file(filename, std::ios_base::in); if(file.good()) { file.imbue(std::locale(std::locale(), new delimeter_tokens())); for(auto& entry : std::istream_iterat...

the following code is not behaving like I would expect. Please help me understand how it works. #include <algorithm> #include <iterator> #include <fstream> #include <vector&gt...

I have constructed a minimal working example to show a problem I've encountered using STL iterators. I'm using istream_iterator to read floatss (or other types) from a std::istream: #include <i...

I'm trying to code opposite action to this: std::ostream outs; // properly initialized of course std::set<int> my_set; // ditto outs << my_set.size(); std::copy( my_set.begin(), my_se...

I'm writing in Microsoft Visual C++ and I'd like my program to either read from standard input or a file using the istream_iterator. Googling the internets hasn't shown how simple I think it must b...