#include <iostream>
#include <iomanip>

const int ARRAYSIZE = 40;

// the function prototypes
void printArr (int[], int, int=5);
int readArr (int[], int);

main()
{
 int size;            // contains how many values are actually
                      // in the array
 int arr[ARRAYSIZE];
 int i;
 int temp;

 cout << "Welcome" << endl << endl;

 cout << "Reading values from the file" << endl;

 // call a function to read in an array
 size = readArr (arr, ARRAYSIZE);

 // call a function to print an array
 cout << endl << "5 per line" << endl;
 printArr(arr, size);
 cout << endl << "8 per line" << endl;
 printArr(arr, size, 8);
 cout << endl << "15 per line" << endl;
 printArr(arr, size, 15);
 cout << endl << "2 per line" << endl;
 printArr(arr, size, 2);
 
 cout << endl << "Goodbye" << endl;
}

// The following function will read in values and store them
//  into an array.
// 
// Parameter 1: the array
//           2: the maximum size of the array
// Return: the number of values actually stored in the array.

int readArr(int arr[], int max)
{
 int i = 0;
 int fileSize;
 int temp;

 // read values into the array (feof)
 while (cin >> temp)
    {
     // verify the number of values read
     if (i >= max)
        {
         cout << "Error: attempted to overfill the array of size "
              << max << endl;
         fileSize = i + 1;
         while (cin >> temp)
              fileSize++;
         cout << "File contains " << fileSize << " values." << endl;
         return i;
        }
     arr[i] = temp;
     i++;
    }


 return i;
}



// The following function will print an array with 5 values
//  per line as a default.  If a third parameter is given, this
//  parameter will specify the number of value per line.
//
//  Parameter 1: The array
//            2: The size of the array
//            3: number of value per line (5 by default)
//  Returns nothing
void printArr(int arr[], int sz, int perLine = 5)
{
 int i;

 // Display the values in the array
 for (i = 0; i < sz; i++)
     {
      // cout << width(5) << arr[i] << "  ";
      cout << arr[i] << "  ";
      if ((i+1) % perLine == 0)
          cout << endl;
     }

}

/*
/homes/home30/hkim16/107> a.out < readfile1.dat
Welcome

Reading values from the file
Error: attempted to overfill the array of size 40
File contains 42 values.

5 per line
1  2  3  4  5
6  7  8  9  0
7  8  4  9  5
1  7  8  4  0
2  3  8  1  5
6  3  9  2  3
2  3  4  2  6
2  7  8  9  0

8 per line
1  2  3  4  5  6  7  8
9  0  7  8  4  9  5  1
7  8  4  0  2  3  8  1
5  6  3  9  2  3  2  3
4  2  6  2  7  8  9  0

15 per line
1  2  3  4  5  6  7  8  9  0  7  8  4  9  5
1  7  8  4  0  2  3  8  1  5  6  3  9  2  3
2  3  4  2  6  2  7  8  9  0
2 per line
1  2
3  4
5  6
7  8
9  0
7  8
4  9
5  1
7  8
4  0
2  3
8  1
5  6
3  9
2  3
2  3
4  2
6  2
7  8
9  0

Goodbye
/homes/home30/hkim16/107>
*/