#include "defs.h"
#include <stdio.h>
#include <stdlib.h>

#define C1 1
#define C2 2
#define C3 3

int main(){
   unsigned char code_now= NOKEY, code_ante;
   unsigned char kbhit=0,kbcode, loop_cnt=0;

   int lumi=50;  //luminozitatea
   char buf_lumi[4];

   unsigned char stare = C1;
   char buf_pit[4];
   unsigned long int a,b,c;


   sysinit();
    TCCR0 = Ob01101100;
      OCR0 = 256*lumi/100;

   while(1){
      if(loop_cnt==200){
         code_ante=code_now;
         code_now = kbscan();
         if(code_now! = NOKEY && code_ante== NOKEY ){
            kbhit=1;
            kbcode=code_now;
         }
         loop_cnt=0;
      }

      //PWM start
      if(kbhit  && (kbcode == 'C' || kbcode == 'D')){
         if(kbcode == 'C'){
               if(lumi < 100){
                  lumi = lumi + 5;
                  OCR0 = 256*lumi/100;
                  //lumi=//...creste luminozitatea
                  //...
               }

         }
         if(kbcode == 'D'){
            //lumi=//...scade luminozitatea
            //...
            if(lumi > 0){
                  lumi = lumi - 5;
                  OCR0 = 256*lumi/100;
            }

         }
         gotoLC(2,1);
         putsLCD("L=");
         itoa(lumi, buf_lumi, 10);
         putsLCD(buf_lumi);
         putsLCD("%  " );
      }
      //PWM end


      //c pitagoreic start
      if( kbhit && kbcode>='0' && kbcode<='9'){
         kbhit=0;

         switch(stare){
            case C1:   //cifra 0
               gotoLC(1, 1);
               putsLCD("                ");
               gotoLC(1, 1);
               buf_pit[0]=kbcode;
             //  scrie prima cifra
               gotoLC(1,1);
               putch(kbcode);
               stare=C2;
               break;

            case C2:
               buf_pit[1]=kbcode;
              // scrie a doua cifra
               gotoLC(1,2);
               putch(kbcode);
               stare=C3;
               break;

            case C3:
               buf_pit[2]=kbcode;
               buf_pit[3]='\0';
              // scrie a treia cifra
               gotoLC(1,3);
               putch(kbcode);
              // scrie "Busy... ," pe linia 1, din coloana 8
               gotoLC(1,8);
               putsLCD("Busy... ");
              // calculeaza c
               c = kbcode - 48;

               for(a = 1;a <= c; a++){
                  for(b = 1; b<= c; b++){
                    // verifica daca a^2 + b^2 = c^2
                     if(a*a+b*b=c*c){
                        spion = 1;
                        goto Pyth_or_not;
                     }
                  }
               }

     Pyth_or_not:
               gotoLC(1,8);
               if(spion == 1){
                  putsLCD("PYTH    ");
               }
               else{
                  putsLCD("nonPYTH ");
               }
               stare=C1;
               break;
         }//end switch
      }
         // end c pitagoreic

      kbhit=0;
      loop_cnt++;
   }//end while
}//end main