atof is not exact

[wakeup]

This is the code

char number[]="0.58";
double value = atof(number);

When I execute it value is 0.57999999999999996

Do you know why?

Thanks in advance

[laitinen]

Do you know why?

Yes I do.

If you want to know, please read these: How is floating point representated? and What are different number representations?

Laitinen

[MrViggy]

Yep. It has nothing to do with 'atof' but how floating point numbers are represented in a binary machine.

Viggy