#define        is                ==
#define        pressed           0
#define        sw1               porta.f0
#define        sw2               porta.f1
const char cownt[]={1,2,4,8,16,32,64,128};
 signed char x=0;
void init()
{
  cmcon=7;
  trisa=3;porta=0;
  trisb=0;portb=0;
}
void main()
{init();
while(1)
{
 if(sw1 is pressed){delay_ms(10);
                    while(sw1 is pressed);
                    delay_ms(10);
                    x++;
                    if(x is 9)x=0;
                   }

if(sw2 is pressed){delay_ms(10);
                   while(sw2 is pressed);
                   delay_ms(10);
                   x--;
                   if(x is -1){x=8;x--; }
                  }
portb=cownt[x];

}


}