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

double factorial ( int n );


int main ( void )
{
  int degree = 10;
  int i;
  double value;
  double x;

  x = 4.0;
  value = 0.0;
  for ( i = 0; i <= degree; i++ )
  {
    value = value + pow ( x, i ) / factorial ( i );
    printf ( "Taylor estimate of degree %i is %g\n", i, value );
  }

  printf ( "\n" );
  printf ( "Exact value is %g\n", exp ( x ) );

  return 0;
}