Hi,
I have some negative numbered value contained in 'char' and i cannot get them displayed properly.
int value;
char toto = -4;
value = value;
lcd->print(value);
SerialUSB.println(value);
Both lcd and serialUSB display 252 !
Displaying an int directly works :
int value;
value = -4;
lcd->print(value);
SerialUSB.println(value);
I then can see a nice -4.
Does anyone have an idea ?
Thanks,
Xavier
gbulmer
Moderator
A better solution is to explicitly declare the char as signed:
signed char toto;
This has two benefits:
1. Everyone can understand the meaning of the type, and hence what should happen, by reading the program code that the compiler uses
2. it doesn't matter what the command line options to gcc are, so it should compile correctly in the Maple IDE, or the Arduino IDE, or any other C/C++ compiler
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