Programming Forums > Application Development > C

maligree · Jul 12th, 2008, 9:54 AM

Hey everyone,

Simple - what's a nice way to count the sum of digits in a floating point number (e.g. 176.3)? Is there a function similar to atoi and itoa but for floats?

EDIT: Actually, I'm more interested in converting float to ASCII, summing up digits is the next step.

Thanks in advance!

Klarre · Jul 12th, 2008, 10:23 AM

One way to convert a float to a string is to use std::stringstream.
Something like this:

(Toggle Plain Text)

float x = 1.0f;
std::stringstream theString;
theString << x;
const char* result = theString.str().c_str();

EDIT: Oops, this was in the C forum not in C++. std::stringstream is only available in C++. Sorry...

Seif · Jul 12th, 2008, 1:44 PM

sprintf

http://www.cplusplus.com/reference/c...o/sprintf.html

maligree · Jul 12th, 2008, 4:37 PM

Ah, thanks a lot.. it seems painfully obvious now.

Jul 12th, 2008, 9:54 AM	#1
maligree Newbie Join Date: Oct 2007 Posts: 4 Rep Power: 0	Sum of digits in a float? Hey everyone, Simple - what's a nice way to count the sum of digits in a floating point number (e.g. 176.3)? Is there a function similar to atoi and itoa but for floats? EDIT: Actually, I'm more interested in converting float to ASCII, summing up digits is the next step. Thanks in advance! Last edited by maligree; Jul 12th, 2008 at 10:10 AM.

Jul 12th, 2008, 10:23 AM	#2
Klarre Game engine designer Join Date: May 2005 Location: Sweden Posts: 310 Rep Power: 4	Re: Sum of digits in a float? One way to convert a float to a string is to use std::stringstream. Something like this: (Toggle Plain Text) float x = 1.0f; std::stringstream theString; theString << x; const char* result = theString.str().c_str(); float x = 1.0f; std::stringstream theString; theString << x; const char* result = theString.str().c_str(); EDIT: Oops, this was in the C forum not in C++. std::stringstream is only available in C++. Sorry... __________________ http://www.klarre.se

Jul 12th, 2008, 1:44 PM	#3
Seif Hobbyist Programmer Join Date: Jan 2006 Location: UK Posts: 225 Rep Power: 3	Re: Sum of digits in a float? sprintf http://www.cplusplus.com/reference/c...o/sprintf.html

Jul 12th, 2008, 4:37 PM	#4
maligree Newbie Join Date: Oct 2007 Posts: 4 Rep Power: 0	Re: Sum of digits in a float? Ah, thanks a lot.. it seems painfully obvious now.

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Programming Forums > Application Development > C

Sum of digits in a float?