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convert char* to double

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Join Date: Aug 2005

Posts: 188

Reputation: bops is an unknown quantity at this point

Solved Threads: 3

bops

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Junior Poster

**convert char* to double**

Jun 12th, 2007

hey, how would i go about converting a char* character array to a double.
I would like to create a function that takes a char array as a parameter such as "1234.1" and then return that as a double value 1234.1.

Is there a function that would allow me to do this or would i have to go about programming it myself?

Thanks.

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Join Date: Sep 2004

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Narue

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Code Goddess

**Re: convert char* to double**

Jun 12th, 2007

>hey, how would i go about converting a char* character array to a double.
Provided the array is actually a string with a terminating '\0' character at the end, you can use strtod. Or, since this is C++, stringstreams make the conversion intuitive if you're used to cin and cout:

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#include <sstream>
 
double to_double ( const char *p )
{
  std::stringstream ss ( p );
  double result = 0;
 
  ss>> result;
 
  return result;
}
#include <sstream>

double to_double ( const char *p )
{
  std::stringstream ss ( p );
  double result = 0;

  ss>> result;

  return result;
}