How to read numbers from an ASCII file (C++)

Question

I need to read in data files which look like this:

* SZA: 10.00
 2.648  2.648  2.648  2.648  2.648  2.648  2.648  2.649  2.650  2.650
 2.652  2.653  2.652  2.653         


        

Answer 1

The String Toolkit Library (Strtk) has the following solution to your problem:

#include 
#include 
#include 
#include 

#include "strtk.hpp"

int main()
{
    std::deque flist;
    strtk::for_each_line("file.txt",
                         [&flist](const std::string& line)
                         { strtk::parse(line," ",flist); }
                         );
    std::copy(flist.begin(),flist.end(),
              std::ostream_iterator(std::cout,"\t"));
    return 0;
}

More examples can be found in C++ String Toolkit (StrTk) Tokenizer.