On 30/07/13 12:59, hemant wrote:
I have written a std code for ARM 32-bit platform using math.h library and
float=powf(float,float) function. When I give input to my system as 100 ^
4.4 it gives me answer as 630957632.0000 (as float) whereas calculator in
WindowsXP gives answer as 630957344.48019324943436013662234.
I just want to know which one is more accurate ???? why is difference ?????
on what things accuracy depends????
Also what do we mean by "arbitrary"-precision??? I have read such word on
MSDN help forums.
how much accurate is my system???? how to improve accuracy??????
Congratulations, you've just reached the limit for single-precision
accuracy...
#include <math.h>
#include <stdio.h>
int main()
{
printf ("float %f\ndouble: %f\n", powf(100, 4.4), pow(100, 4.4));
return 0;
}
$ gcc pow.c -lm
$ ./a.out
float 630957632.000000
double: 630957344.480194
R.
