Why does variable a give "198" instead of "0204" ?
s.ino (558 Bytes)
Post code, not pictures of code.
Done
Close, but no cigar.
What's the big deal that message [0] doesn't get invited to the party?
Because 48 + 50 + 48 + 52 is 198
What is the function I have to use to get "0204"
Do you mean you want "0204" or the octal value 0204?
"0204"
Using+ not substring
Do you want a String (or a string) or the octal value 0204?
String
How can I do it
The String operators are given here.
To append a char to a String, you want to use +=
The + is for the concatenation of Strings. message[n] is a char not a String.
//a=message[1]+message[2]+message[3]+message[4];
for (byte i= 1; i<=4; i++)
{ a += message[i];}
If you are going to use String objects in your code, then you should learn how to use them safely so that you don't run into memory issues.
@drmpf will be along shortly to proselytise.
If you are intent on using String, then why not use the substring function instead of appending a single character at a time?
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