very strange math solution

[Jan Noman]

HI everybody !


cod:


I send A=1,B=2,C=3,D=4,E=5 by transciver



........

putc(A);

....................

putc(E);
.......................


receive:
.....................

int16 value;

int A,B,C,D,E,sign;



while(TRUE)
{

sign=getc();

if(sign==85){
A=getc();
B=getc();
c=getc();
D=getc();
E=getc();
}


lcd_gotoxy(1,1);
printf(lcd_putc,"\f\%U%U%U%U%U",A,B,C,D,E);

in this case all work very good

value on LCD= 12345


but in this case

value = A*10000+B*1000+C*100+D*10+E;

lcd_gotoxy(1,1);
printf(lcd_putc,"\f\%05lu",value);

value on LCD =12089 WHY ?

Best Regards

Jan

[ckielstra]

The type casting rules in CCS are a bit different from ANSI-C compliant compilers. The CCS compiler doesn't automatically upgrade an in-between result to a larger type when overflow errors are possible. Add the casts yourself.

Try again with the following line
value = (int16)A*10000+(int16)B*1000+(int16)C*100+(int16)D*10+E;

[Jan Noman]

Very thanks ckielstra !!!!


I get 12345 on my LCD


Best regads

Jan