%Modules operator

[tong]

problem %Modules operator.
I'm using PCM 3.249 version.

void main(void){
long a;
char b,c;

c=6789;
b=(char)(a/256); //--->26=hex1A
c=(char) (a%256); //---->133=hex85

printf(lcd_putc,"\f %d%d",b,c); //b=26 OK c= -123 (133 is ok)
//why c is -123 ?
}

[tong]

[Ttelmah]

Because you are using the wrong printf declaration.
%d, prints a _signed_ number. %u, prints an 'unsigned'. Now, '133', in binary is 1000 0101. Signed numbers use the first bit as a flag to say this is a -ve number. So when you print this binary value using %d, it is printed as -123.
Print using %u, and everything will be OK.

Best Wishes

[tong]

HI ThTtelmah

%U is OK ,That's right. Thank you.
Thanks for your help.