SOURCE FILE: sortThree.cpp

/* This program uses functions with reference parameters
   to sort a list of three numbers input by the user.
*/


#include <iostream>
using namespace std ;

void GetNumbers(int & x, int & y, int & z) ;
      // get values for x, y, and z from user

void Sort(int & x, int & y, int & z) ;
     // put x, y, and z in ascending order

void PrintOut(int x, int y, int z) ;
     // print x, y, and z, in that order

void swap (int & x, int & y) ;
    // interchange x and y

int main (void)
{
   int i, j, k ;
   GetNumbers(i, j, k) ;
   Sort(i, j, k) ;
   PrintOut(i, j, k) ;

   return 0;
}

void GetNumbers(int & x, int & y, int & z) 
{
   cout << "\nPlease enter three integers: " ;
   cin >> x >> y >> z ;
}

void Sort(int & x, int & y, int & z) 
{
   if (x > y) swap(x,y) ;
   if (y > z) swap(y,z) ;
   if (x > y) swap(x,y) ;
}

void swap (int & x, int & y)
{
   int temp ;
   temp = x ;
   x = y ;  
   y = temp ;
}
  
void PrintOut(int x, int y, int z) 
{
   cout << "\nThe sorted list is: " ;
   cout << x << " " << y << " " << z << endl << endl ;
}