I really hope I am doing this wrong!

Forum 2005-2010 (read only) General Frequently-Asked Questions
#1

After many frustrating hours spent debugging a routine, I have finally shaved it down to this! This will NOT print correctly. Why? I hope this is something trivial or might there be a problem with IDE. Mac 10.6.2 arduino 17

byte a[1]; void setup(){

Serial.begin(9600);

a[1] =54;

Serial.println(a[1], DEC); Serial.println(a[1], DEC); }

void loop(){ }

first print is 54. //good second print is 56. //very bad It will work if non array var is used or if the array is moved into setup.

This creates a different outcome.......still wrong.

byte a[1]; byte b;

void setup(){

Serial.begin(9600);

a[1] =54; b=25;

Serial.println(a[1], DEC); Serial.println(a[1], DEC); Serial.println(b, DEC); Serial.println(b, DEC); }

void loop(){ }

#2

It looks like the references to a[1] are past the end of a[], which is declared to be one element in length, whose name would therefore be a[0], would it not?

-br

#3

It looks like the references to a[1] are past the end of a[], which is declared to be one element in length, whose name would therefore be a[0], would it not?

-br

Agreed. That looks like the problem.

#4

Also use the # button in the message window when you want to post code.

#5

Aarrgh… thanks guys. my self inflicted injuries will heal soon. (not really very deep) Obviously didn’t have an escape line in mental loop! kept assuming A[1] means 2 item (0,1)

for(int i=1; i<=,100, 1++){ // in red chalk on blackboard
print “Consider EVERY line, stupid. It ain’t THAT hard.”
}
Again, thanks Forum Guys.

#6 
for(int  i=1; i<=[glow],[/glow]100, [glow]1++[/glow]){                                         // in  red chalk on blackboard
[glow]Serial.[/glow]print[glow]([/glow]"Consider EVERY line, stupid. It ain't THAT hard."[glow]);[/glow]
}

Well, maybe it is hard. :wink:

#7

Well there is more wrong with it then that.

need a ';' after the 100 not a ','.

#8