(C++) Check if a std::string can be converted to a double

include <sstream>


///Checks whether a std::string can be converted to a double.
///Returns true if possible, also returning this integer by referencing.
///Returns false otherwise, setting the referenced double to zero.
bool isDouble(const std::string& s, double& rDouble)
{
  std::istringstream i(s);
  if (!(i >> rDouble))
  { 
    rDouble = 0; 
    return false; 
  }
  return true;
}

(C++ Builder) Check if a String can be converted to a double

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