/*  This is another example meant to illustrate
the loss of significant digits that may occur when
subtracting nearly equal quantities.  */


#include <iostream>
#include <cmath>
using namespace std;

float f1( float x )
{
   return( sqrt( x + 1.0F ) - 1.0F );
}

float f2( float x )
{
    return( x / ( sqrt( x + 1.0F ) + 1.0F ) );
}

int main()
{
   float x = 1.2345678e-5;
   
   cout.precision(8);  //  This sets the number of digits to be displayed
  
   cout << "   x  = " << x << "\n\n";
   cout << "f1(x) = " << f1(x) << "\n";
   cout << "f2(x) = " << f2(x) << endl;
         
   cout << "\n\n"; system( "PAUSE" );  // This line is system dependent
   return( 0 );
}