Billionrandom

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

void printNumber(unsigned long num, int base)
{
  unsigned long i = 0UL;

  switch (base)
    {
    case 2:
      printf("0b");
      for (i = INT_MAX; i >= num; i = i >> 1)
	;
      for (i = (i << 1) & ~i; i > 0; i = i >> 1)
	{ printf("%c", (i & num) ? '1' : '0'); }
      printf("\t");
      break;
    case 8:
      printf("0%o\t", num);
      break;
    case 10:
      printf("%u\t", num);
      break;
    case 16:
      printf("0x%X\t", num);
      break;
    }
}

int main(int argc, char **argv)
{
  unsigned long a = 1664525UL, 
    b = 1013904223UL, 
    c = 0UL, 
    d = 0UL, 
    e = 1000000000UL;
  
  char *val = 0;

  if (2 == argc)
    {
      if (('-' == argv[1][0])
	  && ('v' == argv[1][1]))
	{
	  printf("COSC 125, Spring 2006\n"
		 "Linear Congruential Generator, v1.0\n");
	  exit(0);
	}
      val = argv[1];
      e = 0UL;
      while (0 != *val)
	{
	  e = e * 10 + *val - '0';
	  val++;
	}
    }

  for (c = 0UL; c < e; c++)
    {
      d = a * d + b;
      if (0 == (d % 1000))
	{ printf("\n"); }
      switch (c % 4)
	{
	case 0: printNumber(d, 2);  break;
	case 1: printNumber(d, 8);  break;
	case 2: printNumber(d, 10); break;
	case 3: printNumber(d, 16); break;
	}
    }

  printf("\n");
  return c;
}