This is the program source:
--------
#include <fstream.h>
#include <stdio.h>

int main(void) {
  long double pi = 3.14791843300216;
  printf("%.14Lf\n",pi);
  cout.form("%.14Lf\n",pi);
}
--------

and this is the strange output (compiled in DOS environment):
--------
3.14791843300216
-8383512472738002870998441900165772287613599744.00000000000000
--------

(On the linux box the output is correct.)

Upgrade to v2.01.