#include<stdio.h>
#include <math.h>

int main()
  {
  double one, two, three, four, five, six;
  double pi;
  int i, fin;

  one = 2.0 - 1.0;
  printf("one   = %2.16f\n", one);

  pi = 4.0*atan(1.0);
  /* printf ( " Value of PI = %2.16f \n\n", pi ); */

  two = pow ( 1.0/(cos (100.0*pi+pi/4)), 2.0);
  printf("two   = %2.16f\n", two);

  three = 3.0*tan(atan(100000000.0))/100000000.0;
  printf("three = %2.16f\n", three);

  four = 4.0;
  for (i=0; i<20; i++)
    four = sqrt(four);
  for (i=0; i<20; i++)
    four *= four; 
  printf("four  = %2.16f\n", four);

  five = 5.0 * ((1.0 + exp(-100.0)) - 1.0) / ((1.0 + exp(-100.0)) - 1.0) ;
  printf("five  = %2.16f\n", five);

  six = log (exp(6000.0))/1000.0;
  printf("six   = %2.16f\n", six);

  return 0;
  }