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src/tests/tests2/32_led.c  view on Meta::CPAN

   /* extract digits from x */

   n = ( x == 0L ? 1 : 0 );  /* 0 is a digit, hence a special case */

   while(x){
      d[n++] = (int)(x%10L);
      if(n >= MAX_DIGITS)break;
      x = x/10L;
   }

   /* print top lines of all digits */

   for(i=n-1;i>=0;i--){
      topline(d[i],buf);
      buf += 3;
      *buf++=' ';
   }
   *buf++='\n'; /* move teletype to next line */

   /* print middle lines of all digits */

   for(i=n-1;i>=0;i--){
      midline(d[i],buf);
      buf += 3;
      *buf++=' ';
   }
   *buf++='\n';

   /* print bottom lines of all digits */

   for(i=n-1;i>=0;i--){
      botline(d[i],buf);
      buf += 3;
      *buf++=' ';
   }
   *buf++='\n';
   *buf='\0';
}

int main()
{
   char buf[5*MAX_DIGITS];
   print_led(1234567, buf);
   printf("%s\n",buf);

   return 0;
}

#ifndef NO_MAIN
int main(int argc, char **argv)
{

   int i=0,n;
   long x;
   static int d[MAX_DIGITS];
   char buf[5*MAX_DIGITS];

   if(argc != 2){
      fprintf(stderr,"led: usage: led integer\n");
      return 1;
   }

   /* fetch argument from command line */

   x = atol(argv[1]);

   /* sanity check */

   if(x<0){
      fprintf(stderr,"led: %d must be non-negative\n",x);
      return 1;
   }

   print_led(x,buf);
   printf("%s\n",buf);

   return 0;

}
#endif

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