Quasi 0

Hi friends:
Machine epsilon is the maximum relative error of the chosen rounding
procedure

#include <stdio.h>
#include <math.h>
#include <float.h>

int main(void)
{
double a = 0.1;
double b = 0.1;

a += 1.0;
a -= 1.0;

printf("a == b = %s\n", a == b ? "equals" : "unequals");
printf("a == b = %s\n", fabs(a - b) < DBL_EPSILON ? "equals" :
"unequals");
return 0;
}

Is this a good method for test the equality?


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