atoi with ints and doubles

Question

Can I use atoi to convert a text input to a dialog box to a double?

I need to do a calculation on several double values that have been input using a dialog box. I only know of 'atoi' but is this for integers only?

Answer 1

Assuming Boost is an option, Boost.lexical_cast is a popular approach for converting to and from string representations of numerical values, e.g.:

char const s[] = "1.2345";
try
{
  double d = boost::lexical_cast<double>(s);
  ...
}
catch (boost::bad_lexical_cast &)
{
  ...
}