#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <float.h>

const long PRECISION = 5000;
const int CALC_PREC = 7;
const int CALC_ALPHA = 10;

static long base;
static long last;

void add(long z[], long x[], long y[])
{
   long i, t, r = 0;
   for (i = last; i >= 0; --i) {
      t = x[i] + y[i] + r;
      r = t / base;
      z[i] = t - r * base;
   }
}

void sub(long z[], long x[], long y[])
{
   long i, t, r = 1;
   for (i = last; i >= 0; --i) {
      t = x[i] + (base - y[i] - 1) + r;
      r = t / base;
      z[i] = t - r * base;
   }
}

void mul(long z[], long x[], long k)
{
   long i, t, r = 0;
   for (i = last; i >= 0; --i) {
      t = x[i] * k + r;
      r = t / base;
      z[i] = t - r * base;
   }
}

void dvd(long z[], long x[], long k)
{
   long i, r = 0;
   double t;
   for (i = 0; i <= last; ++i) {
      t = x[i] + (double)r * base;
      z[i] = t / k;
      r = t - (double)k * z[i];
   }
}

void print(long x[]) {
  int i, j, c1, c2;
  int d;
  long t;
  c1 = c2 = 0;
  for (i = 0; i < ceil((double)PRECISION / CALC_PREC) + 1; i++) {
    t = x[i];
    for (j = CALC_PREC - 1; j >= 0; --j) {
      d = t / (long)pow(10, j);
      t = t - d * (long)pow(10, j);
      putchar('0' + d);
      if (++c1 >= 10) {
        putchar(' ');
        c1 = 0;
        if (++c2 >= 5) {
          putchar('\n');
          c2 = 0;
        }
      }        
    }
  }
}

int iszero(long x[]) {
  int i;
  int flag = 1;
  for (i = 0; i <= last; i++)
    if (x[i] != 0) {
      flag = 0;
      break;
    }
  return flag;
}

int main()
{
  long n;
  long *s, *t;

  base = pow(10, CALC_PREC);
  last = ceil((double)PRECISION / CALC_PREC) + CALC_ALPHA;

  s = malloc((last + 1) * sizeof(long));
  t = malloc((last + 1) * sizeof(long));
  memset(s, 0, (last + 1) * sizeof(long));
  memset(t, 0, (last + 1) * sizeof(long));
  t[0] = base / 2;
  n = 2;
  while (!iszero(t)) {
    add(s, s, t);
    n++;
    dvd(t, t, n);
  }
  printf("e = 2.\n");
  print(s);

  free(s);
  free(t);
  return 0;
}
/* end */

In function `print':
undefined reference to `pow'
undefined reference to `pow'