I have forgotten how much i hate C++
Its not doing what you say it would but it did do other odd ball
things. I miss my foxpro :-(.
Plus its not holding 15 precision points
#include <stdio.h>
#include <cmath>
int main()
{
double a = 0.1;
//double b = 1000;
double c = 100000000;
double d ; //= a * b;
for( int i = 1 ; i < 10 ; i++)
{
d = pow(a,i)+ c ;
printf("%.10f\n", d);
d = d-c ;
printf("%.10f\n", d);
}
return 0;
}
Sam Mason wrote:
On Tue, May 13, 2008 at 02:36:18PM -0400, Justin wrote:
Double holds 15 places which is the highest value of precision it can
maintain before rounding occurs.
Is is limit less no, but what is?
Practically speaking taking a vale 0.000,000,000,000,001 aka
1 trillionth of anything,
But remember that if you add this value onto a large number and then
take off the large number the result will be zero.
(0.000,000,000,01 + 1,000,000) - 1,000,000 ==> 0
0.000,000,000,01 + (1,000,000 - 1,000,000) ==> 0.000,000,000,01
In general, operations on floating point numbers will increase their
errors.
i view the problem solved for 98% of problems.
Floating point math is good for most problems, hence why most languages
expose the abstraction.
Sam
