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CppIntToStr

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(C++) Converting an integer to a std::string

In analogy with the standard 'atoi' function, doing the other way around:

(function taken from from Marshall Cline's C++ FAQ Lite document http://www.parashift.com/c++-faq-lite/)

include <sstream>

include <cassert>


std::string itoa(const int x)
{
  std::ostringstream o;
  if (!(o << x)) return "ERROR";
  return o.str();
}
int main()
{
  assert(itoa(69)=="69");
}

You could also use the Boost C++ Library's lexical_cast:

include <cassert>

include <string>

include <boost/lexical_cast.hpp>


int main()
{
  const int i = 123;
  const std::string s = boost::lexical_cast<std::string>(i);
  assert(s == "123");
}

Other code snippets

(C++ Builder) Converting an integer to a String

Code links

• ::, scope operator
• #include
• assert
• char
• const
• if
• #include
• int
• main
• return
•  ?sstream
• std
• std::string
• string
• scope operator, ::
• return

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