// This program allows you to practice with prototypes and
// function calls for Lab 3.  Note that the comments provided
// in this program are to help you with the terminology.  They
// are NOT the type of comments you should place in your
// programs in general.

#include <iostream.h>
#include <iomanip.h>

// The prototypes for power, power2 and absdiff are missing.
// Place these prototypes here:




int main()
{
  int a, b;            // Actual parameters used for power and power2
  float c, d;          // Actual parameters used for absdiff
  long p2_result, p_result;        // Output from power and power2
  float a_result;                  // Output from absdiff

  cout << "Please enter 2 integers (with a space between them):  ";
  cin >> a >> b;

  // Place your function calls for power and power2 here:




  cout << endl << endl
       << 2 << "^" << a << " = " << p2_result << endl;
  cout << a << "^" << b << " = " << p_result << endl << endl << endl;

  cout << "Please enter 2 real numbers (with a space between them):  ";
  cin >> c >> d;

  // Place your function call for absdiff here:



  cout << endl << endl << setiosflags(ios::fixed) << setprecision(3)
       << "|" << c << "-" << d << "| = " << a_result << endl << endl;

  return 0;
}

////////////////////////////////////////////////////////////////////
// THE FOLLOWING ARE THE FUNCTION IMPLEMENTATIONS.                //
// YOU DO NOT NEED TO UNDERSTAND THE CODE INSIDE THESE FUNCTIONS. //
////////////////////////////////////////////////////////////////////

// Function implementation for power2
long power2 (int x)
{
  return 1 << x;
}

// Function implementation for power
long power (int x, int y)
{
  long result = 1, i;
  for (i = 1; i <= y; ++i)
    result *= x;
  return result;
}

// Function implementation for absdiff
float absdiff (float x, float y)
{
  float diff = x-y;
  if (diff < 0)
    return -diff;
  else 
    return diff;
}