topic Re: float to char conversion in Classic/Legacy CodeWarrior

float to char conversion

fongguay — Sat, 09 Aug 2008 10:37:34 GMT

I'm sure that this is a popular question:
How do you convert a 4 byte float into 4 chars? I have tried type casting and doing funny stuff with pointers, but it appears that Code Warrior is saying "I know what you're trying to do, and I won't let you." (I either get an explicit or implicit change of data type error). All I want is the raw float, in bits, in IEEE-754 format, broken into 4 bytes so that I can ship it out one byte at a time. I haven't tried the sprintf deal yet, seems a bit impractical, but if that's what I have to do...

thanks in advance for any help here.

Re: float to char conversion

BlackNight — Sun, 10 Aug 2008 02:19:29 GMT

Hello,
I would use a union like this one:
union {
float f;
char c[4];
} u;

with u.f = 1.0 you store a float, and with u.c[0] etc you can get the indivdual bytes.
Hope this helps.

BlackNight

Re: float to char conversion

fongguay — Mon, 11 Aug 2008 05:41:24 GMT

This worked, thank you!