// Ex5_12.cpp
  // Returning a reference
  include <iostream>
  include <iomanip>
  using std::cout;
  using std::endl;
  using std::setw;
  
  double& lowest(double values[], int length); // Prototype of function
                                               // returning a reference
  
  int main(void)
  {
     double array[] = { 3.0, 10.0, 1.5, 15.0, 2.7, 23.0,
                        4.5, 12.0, 6.8, 13.5, 2.1, 14.0 };
     int len = sizeof array/sizeof array[0];   // Initialize to number
                                               // of elements
  
     cout << endl;
     for(int i = 0; i < len; i++)
        cout << setw(6) << array[i];
  
     lowest(array, len) = 6.9;                 // Change lowest to 6.9
     lowest(array, len) = 7.9;                 // Change lowest to 7.9
  
     cout << endl;
     for(int i = 0; i < len; i++)
        cout << setw(6) << array[i];
  
     cout << endl;
     return 0;
  }
  
  double& lowest(double a[], int len)
  {
     int j = 0;                                // Index of lowest element
     for(int i = 1; i < len; i++)
        if(a[j] > a[i])                        // Test for a lower value...
           j = i;                              // ...if so update j
     return a[j];                              // Return reference to lowest 
                                               // element
  }