String to int

Projects Programming
1

Hy

I got a problem with the atoi() command. Sometimes it does work and sometimes not...
example
I do process 360 values which i get through the serial.
The first column isn't a problem but as you can see in the second sometimes a "-" sign appears and
the value is completely wrong. Why does this happen?

217,31515
218,31721
219,31940
220,32172
221,32417
222,32676
223,-32587
224,-32299
225,-31995
226,-31676
227,-31340
228,-30920
229,-31935
230,32653
231,31767
232,30937
233,30158
234,29425
235,28737

Thx Andy

2

Why does this happen?

Could be bad code, or then again tould be something else. Have you sacrificed a chicken lately to keep things in balance?

3

The largest number an int can hold is 32767, if that answers your question. Trying to go larger turns on the sign bit and it becomes negative.

4

strtol() will handle all of the values in your example. See avr-libc: <stdlib.h>: General utilities

5

How could I forget that of course that was the mistake!
Thx a lot!

Andy