// FILE: Sort3Nmb.cpp
// READS THREE FLOATING POINT NUMBERS AND SORTS THEM IN ASCENDING
//    ORDER

#include <iostream.h>

// Functions used ...
// SORTS A PAIR OF FLOATING POINT NUMBERS
void order
  	(double&, double&);	// INOUT: numbers to be ordered

int main ()
{
   // Local data ...
   double num1, num2, num3;		// input: holds numbers to be sorted

   // Read and sort numbers.
   cout << "Enter 3 numbers to be sorted separated by spaces:"
        << endl;
   cin >> num1 >> num2 >> num3;
   order (num1, num2);		// order the data in num1 and num2
   order (num1, num3);		// order the data in num1 and num3
   order (num2, num3);		// order the data in num2 and num3

   // Print results.
   cout << "The three numbers in order are:" << endl;
   cout << num1 << " " << num2 << " " << num3 << endl;

   return 0;
} //end main

// SORTS A PAIR OF NUMBERS REPRESENTED BY x AND y
void order
  (double& x, double& y)	// INOUT: numbers to be ordered
// Pre:  x and y are assigned values.
// Post: x is the smaller of the pair and y is the larger.
{
   // Local data ...
   double temp;			// temp holding cell for number in x

   // Compare x and y and exchange values if not properly ordered.
   if (x > y)
   {			// exchange the values in x and y
      temp = x;	// store old x in temp
      x = y;		// store old y in x
      y = temp;	// store old x in y
   }  // end if
}  // end order