#pragma idata x = 0x100	
unsigned char x=5;	
#pragma idata y = 0x101	
unsigned char y=9;	
#pragma udata z = 0x102	
unsigned char z;		
#include <P18F458.h>
void main(void)
  {
    TRISB = 0;		
    z = x + y;
    PORTB = z;
  }