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Count number of digits of a variable

 
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pilar



Joined: 30 Jan 2008
Posts: 197

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Count number of digits of a variable
PostPosted: Thu Sep 22, 2016 11:53 am     Reply with quote
Hi,

How can I count the number of digits of a variable...

A=[12875] how can I get 5 as the number of digits in A?
alan



Joined: 12 Nov 2012
Posts: 357
Location: South Africa

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PostPosted: Thu Sep 22, 2016 12:01 pm     Reply with quote
itoa() then len() of string.

Regards

Maybe I should have been more clear and checked the syntax of CCS before posting.

Code:

char str[10];
int8 len;

itoa(A,10,str);

len = strlen(str);


len contains the number of decimals from A
guy



Joined: 21 Oct 2005
Posts: 297

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PostPosted: Sat Sep 24, 2016 1:02 pm     Reply with quote
much quicker:
is it>=10? if not, one digit.
else is it>=100? if not, two digits...
and to optimize ever further, start by comparing to the middle value. For 5-digit number, is it >=1000 ? This will statistically improve the timing.
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