Hi,
you can not check if 2 float are equal, you should check if it in the range:
On 01/11/2011 08:38 AM, ratheesh k wrote:
I could not understand why it getting printed like this. Could any
body tell me.
#include<stdio.h>
#define ABS(x) ((x) < 0 ? -(x) : (x))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
const float precision = 0.001f;
int main()
{
float f=0.0f;
int i;
for(i=0;i<10;i++)
f = f + 0.1f;
if ( ABS(f - 1.0f) < precision )
printf("f is 1.0 \n");
else
printf("f is NOT 1.0\n");
return 0;
}
Here more to that topic:
https://www.securecoding.cert.org/confluence/display/seccode/FLP35-C.+Take+granularity+into+account+when+comparing+floating+point+values
Here more about c pitfalls:
https://www.securecoding.cert.org/confluence/display/seccode/CERT+C+Secure+Coding+Standard
Regards,
Andrej Gelenberg
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