// Soln4_1.cpp
  include <iostream>
  include <iomanip>
  using std::cin;
  using std::cout;
  using std::endl;
  using std::setw;
  
  int main()
  {
    int arraySize = 5;
    double* values = new double[arraySize];    // Initial array to store values
    double* temp = 0;                          // Temporary store for new array
    double inputValue = 0.0;                   // Current input value
    int index = 0;                             // Index to the values array
    for(;;)
    {
      // Read the next value
      cout << "Enter a value or 0 to end: ";
      cin >> inputValue;
  
      // If it is 0 we are done so exit the loop
      if(inputValue == 0.0)
        break;
  
      values[index++] = inputValue;            // Store the value and increment index
  
      if(index == arraySize)                   // If index reaches arraySize
      {                                        // We need a bigger array...
        arraySize += 5;                        // Increase the array size value
        temp = new double[arraySize];          // Allocate the new array
  
        for(int i = 0 ; i<index ; i++)         // Copy old array elements to new
          temp[i] = values[i];
  
        delete[] values;                       // Delete the old array
        values = temp;                         // Store address of new array
        temp = 0;                              // Reset temp to null
      }
    }
    // Calcuate the average and output the values
    double average = 0.0;                      // Store for the average
    for(int i = 0 ; i<index ; i++)
    {
      average += values[i];                    // Add value
      cout << setw(10) << values[i];           // Output current value
      if((i+1)%5 == 0)                         // If it's multiple of 5
        cout << endl;                          // start a new line
    }
    cout << endl                               // Output the average
         << "Average is " << average/index
         << endl;
    delete[] values;                           // Release memory for array
  
    return 0;
  }