conversion float to int8

dynamitron · Joined: 18 Mar 2009 Posts: 38

I am developing a thermostat based on a DS18b20.

I would like to compared the temperature stored in a float variable to an integer 8 bit.

For this purpose I would like to convert the float variable into a int8 and then make the comparison ?
How to do this conversion assuming that I am not interested in the decimal part of the float ?

Thanks in advance for the hints !! ,

Dynamitron

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Do it by casting the float to an int. C tutorial page:
http://www.cs.cf.ac.uk/Dave/C/node9.html#SECTION00930000000000000000

nostep · Joined: 04 Mar 2009 Posts: 16

You don't necessarily have to convert it then compare it. You could do this:

dynamitron · Joined: 18 Mar 2009 Posts: 38

Thanks to both of you, this is exactly what I wanted.
I like the "no conversion" comparison.

Dynamitron

Ttelmah · Guest

If you had looked at the link PCM programmer gave, you would see exactly the same suggestion. This _is_ a cast, and what you are doing, is converting the float to an int, before the conversion.....

Best Wishes