Forverse – Reverse Control For CSS Compiler

 
#include <16F877.h>
#device adc=8
#FUSES NOWDT ,XT                                        
#use delay(clock=4000000)

void main()
{
   setup_adc_ports(NO_ANALOGS);
   setup_adc(ADC_OFF);  
   set_tris_a(0xff);
   set_tris_b(0x00);
   output_b(0x00);
while(true){
  if(!input(pin_a0)){ 
       output_high(pin_b0);
       output_low(pin_b1);
       delay_ms(100);
       while(!input(pin_a0));}

  else if(!input(pin_a1)){ 
       output_low(pin_b0);
       output_high(pin_b1);
       delay_ms(100);
       while(!input(pin_a1));}
  else if(!input(pin_a2)){ 
       output_low(pin_b0);
       output_low(pin_b1);
       delay_ms(100);
       while(!input(pin_a2));}              
  else{           
      }      
  }
}