[C] MSREAL primer

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

/*
char readBtn1() {
}*/


int main ()
{
  int rval;
  FILE *fp;
  FILE *fp1;
  FILE *fp2;
  char *str;
  int tval1,tval2;
  int tval1_old, tval2_old;

  size_t num_of_bytes = 1;

  float percentage;
  float pcnt_step = 0.2;
    long int period = 20000L;

  while(1)
    {

      //Citanje vrednosti prvog tastera
      fp1 = fopen ("/sys/class/gpio/gpio956/value", "r");
      if(fp1==NULL)
        puts("Problem pri otvaranju 1. fajla");

      str = (char *)malloc(num_of_bytes+1);
      getline(&str, &num_of_bytes, fp1);

      if(fclose(fp1))
        puts("Problem pri zatvaranju 1. fajla");

      sscanf(str, "%d", &tval1);
      free(str);

      if(tval1 && tval1 != tval1_old && percentage+pcnt_step < 1) {
        percentage+=pcnt_step;
        tval1_old = tval1;
      }


      // -----------------------------------------------

      //Citanje vrednosti drugog tastera
      fp2 = fopen ("/sys/class/gpio/gpio957/value", "r");
      if(fp2==NULL)
        puts("Problem pri otvaranju 2. fajla");

      str = (char *)malloc(num_of_bytes+1);
      getline(&str, &num_of_bytes, fp2);

      if(fclose(fp2))
        puts("Problem pri zatvaranju 2. fajla");

      sscanf(str, "%d", &tval2);
      free(str);

      //Ispis procitanih vrednosti
      printf("\n:Taster1: %d        Taster2: %d", tval1, tval2);
      usleep(100000);

      if(tval2 && tval2 != tval2_old && percentage-pcnt_step > 0) {
        percentage-=pcnt_step;
        tval2_old = tval2;
      }

      // ------------------------------------------------
      fp = fopen("/proc/myled", "w");
      if(fp == NULL)
      {
        printf("Cannot open /proc/myled for write\n");
        return -1;
      }
      fputs("0x0F\n", fp);
      fclose(fp);
      usleep(percentage*period);

      fp = fopen("/proc/myled", "w");
      if(fp == NULL)
        {
          printf("Cannot open /proc/myled for write\n");
          return -1;
        }
      fputs("0x00\n", fp);
      fclose(fp);
      usleep((1-percentage)*period);
    }


    }



  return 0;
}