[DjOptimuS]

I tried to make a plugin today for mp_roundtime, to let admins set this cvar but restricted between 2 floats, mine are minimum 1.75 and maximum 5.0

But for example, when i convert the 1.9 string into float, the plugins returns 1.899999.

What's really funny it's when i convert the 1.899999 float back to string, which will return 1.8

Finally i tried to set the cvar as a string itself and it worked, but i wonder why is this happening and how to avoid it. Thank you.

PS. I already tried with floatround, nothing seems to work. Or maybe i did something wrong. Thank you.

[DjOptimuS]

A tiny test code

PHP Code:

#include <amxmodx>
#include <amxmisc>

#define PLUGIN    "New Plugin"
#define AUTHOR    "Unknown"
#define VERSION    "1.0"

public plugin_init()
{
    register_plugin(PLUGIN, VERSION, AUTHOR)
    register_srvcmd("test", "test", -1, "- help");
}

public test()
{
    new float[] = "1.9";
    new Float:testare = str_to_float(float);
    server_print("%f", testare);
    server_print("");
    server_print("");
    server_print("");
    formatex(float, sizeof (float) - 1, "%f", testare);
    server_print(float);
    server_print(float);
    server_print(float);
} 


This prints

test
1.899999



1.8
1.8
1.8

[Exolent[jNr]]

It's been known for a lot of languages to have this issue with floating points.

[jim_yang]

http://en.wikipedia.org/wiki/Single_...g-point_format
for the reason of the precision, some real numbers can't be accurate in this format