c++ - parse collection of single integers into floats -
so slurped in file numbers in like: 39.00 vector<std::string> , need convert groups of numbers 3 9 0 0 form 39.00
heres small sample.
3 4 5 0 1 2 5 0 3 4 0 0 3 4 9 0 7 0 0 0 8 0 0 0 9 0 0 0 6 5 0 0 3 9 3 2 1 1 2 0 0 0 2 5 0 0 3 0 9 0 4 0 0 0 5 5 5 0 2 0 0 0 2 5 0 0 3 0 9 0 4 0 0 0 5 5 5 0 2 2 3 0 0 0 2 4 0 0 4 5 0 0 6 7 0 0 6 5 5 0 5 6 9 0 8 7 0 0 4 3 5 0 5 6 9 8 5 5 4 0 3 3 6 2 0 0 3 4 5 0 1 2 5 0 3 4 0 0 3 4 9 0 7 0 0 0 8 0 0 0 9 0 0 0 6 5 0 0 3 9 0 3 2 1 1 2 0 0 0 2 5 0 0 3 0 9 0 4 0 0 0 5 5 5 0 2 0 0 0 2 5 0 0 3 0 9 0 4 0 0 0 5 5 5 0 2 2 3 0 0 0 2 4 0 0 4 5 0 0 6 7 0 0 6 5 5 0 5 6 9 0 8 7 0 0 4 3 5 0 5 6 9 8 5 5 4 0 3 3 6 2 0 0 3 4 5 0 1 2 5 0 3 4 0 0 3 4 9 0 7 0 0 0 8 0 0 0 9 0 0 0 6 5 0 0 3 9 0 0 transformed 34.50 12.50 34.00....
my goal find average of floats.
of course if there way slurp file while keeping formatting using standard library cool too.
#include <iostream> #include <string> #include <fstream> #include <streambuf> #include <regex> #include <vector> #include <math.h> void tablewriter(std::string); float employeeaverage(std::string); float employeetotal(std::string); float totalaverage(std::string); void totalpayroll(std::string, std::vector<std::string>); std::string getemployeename(std::string, std::string[]); int main(int argc, const char * argv[]) { try { std::vector<std::string> regexcontainer; std::ifstream t("thesales.txt"); std::string thesales; t.seekg(0, std::ios::end); thesales.reserve(t.tellg()); t.seekg(0, std::ios::beg); thesales.assign((std::istreambuf_iterator<char>(t)), std::istreambuf_iterator<char>()); //std::cout << thesales << std::endl; totalpayroll(thesales, regexcontainer); std::cout << std::endl << regexcontainer.empty() << std::endl; return 0; } catch (int w) { std::cout << "could not open file. exiting now." << std::endl; return 0; } } void tablewriter(std::string){} float employeeaverage(std::string){return 0.0;} float employeetotal(std::string){return 0.0;} float totalaverage(std::string){return 0.0;} void totalpayroll(std::string thesales, std::vector<std::string> regexcontainer) { std::string matches; std::regex pattern ("\\d"); const std::sregex_token_iterator end; (std::sregex_token_iterator i(thesales.cbegin(), thesales.cend(), pattern); != end; ++i) { regexcontainer.push_back(*i); (std::vector<std::string>::const_iterator = regexcontainer.begin(); != regexcontainer.end(); ++i) std::cout << *i << ' '; } } this data:
2.40 5.30 6.30 65.34 65.34 3.40 7.80 3.20 65.34 65.34 3.40 5.20 8.20 23.54 12.34 2.42 5.30 6.30 5.00 65.34 3.44 7.80 3.20 34.55 65.34 3.45 5.20 8.20 65.34 65.34
functions such fscanf able read file , return correctly formed float number. should more efficient trying reconstruct them stream of char...
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