(C++) DoubleToStr

 

DoubleToStr is a code snippet to convert an double to std::string. To convert a std::string to double, use StrToDouble.

 

DoubleToStr has multiple versions:

• DoubleToStr using the C++98 and the STL
• DoubleToStr using the C++98 and the Boost library
• DoubleToStr using the C++11 and the STL

 

• Download the Qt Creator project 'CppDoubleToStr' (zip)

 

 

 

 

 

DoubleToStr using the C++98 and the STL

 

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#include <stdexcept> #include <sstream> //From http://www.richelbilderbeek.nl/CppDoubleToStr.htm const std::string DoubleToStr(const double x) {   std::ostringstream s;   if (!(s << x)) throw std::logic_error("DoubleToStr failed");   return s.str(); }

 

The code snippet above was modified from the C++ FAQ Lite.

 

 

 

 

 

DoubleToStr using the C++98 and the Boost library

 

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#include <string> #include <boost/lexical_cast.hpp> //From http://www.richelbilderbeek.nl/CppDoubleToStr.htm const std::string DoubleToStr(const double x) {   return boost::lexical_cast<std::string>(x); }

 

 

 

 

 

DoubleToStr using the C++11 and the STL

 

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#include <string> //From http://www.richelbilderbeek.nl/CppDoubleToStr.htm const std::string DoubleToStr(const double x) {   return std::to_string(x); }

 

 

 

 

 

External links

 

• C++ FAQ lite page about double to std::string conversion