printf float format like "%0.02f" does not work

sandrobastos · ‎08-31-2015

Hi Rene,

18 months later this discussion, another float format problem was found.

I'm still using MQX 4.1.1, with the corrections discussed in this post.

I'm using the float format "%0.02f" to obtain outputs of type "x.yz".

1- If the number is, for example, 1.234, I get "1.23" ---> that's right.

2- If the number is shorter than one and greater than 0.1, for example, 0.123, the output string is "012" (without dot) and not "0.12".

3- If the number is shorter than 0.1, e.g. 0.05, it also works giving an "0.05" string.

Resuming, the wrong result is for the range: 0.1 <= x < 1.0

Another workaround or correction I could apply?

thank you,

sandro

kaif · ‎09-23-2015

Hi.

I'm having the same problems here.

Kai

dshimizu · ‎09-02-2015

Hello Sandro,

On MQX for Kinetis when I try:

float pi = 3.1415;

printf("The Pi number is: %2.2f\n",pi);

printf("And a tenth of Pi is: %2.2f\n",pi/10);

I got on the terminal:

The Pi number is: 3.14

And a tenth of Pi is: 0.31

Can you make a test trying to use %1.2f instead?

sandrobastos · ‎09-02-2015

Hi Denis,

I've just run your example and got a wrong output (the same for "%2.2f" and "%1.2f"):

The Pi number is: 3.14

And a tenth of Pi is: 031

Remember I'm using a patched MQX4.1.1 (see the link at the top of this post); maybe the patches are causing this problem.

thank you and best regards,

sandro

rendy · ‎09-02-2015

Hello, I will check this and provide a patch soon.

sandrobastos · ‎09-03-2015

Hi Rene,

the old bug, cited in the top link of this post, is still present in MQX 4.2 :(

so we have to apply that patches that brings this new bad behavior.

regards,

sandro