(C++) ReadDoubleFromFile

 

File I/O code snippets to read the first line of a file and convert it to a double.

 

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///ReadDoubleFromFile reads the first line of a file ///and converts it to a double. ///From http://www.richelbilderbeek.nl/CppReadDoubleFromFile.htm double ReadDoubleFromFile(const std::string& fileName) {   const std::vector<std::string> v = FileToVector(fileName);   assert(v.empty()==false);   const double d = std::atof(v[0].c_str());   return d; }