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// Array demo - demonstrate the use of arrays by 
// reading a sequence of integers and then displaying them in order.

#include <cstdlib>
#include <iostream>

using namespace std;

// Prototype Declarations
int sumArray(int integerArray[], int sizeOffloatArray);
void displayArray(int integerArray[], int sizeOffloatArray);

int main(int argc, char *argv[])
{
    //input the loop count
    int nAccumulator = 0;
    cout << "This program sums the values entered "
         << "by the user.\n";
    cout << "Terminate the loop by entering a"
         << " negative number.\n";
    cout << endl;
    
    //store numbers into an array
    int inputValues[128];
    
    int numberOfValues;
    for(numberOfValues =0;
    numberOfValues < 128;
    numberOfValues++)
    {
                     //fetch another number
                     int integerValue;
                     cout << "Enter next number: ";
                     cin >> integerValue;
                     
                     //if its negative...
                     if (integerValue < 0)
                     {
                                      //...the break and exit
                                      break;
                     }
    //otherwise store the number into a new storage array
    inputValues[numberOfValues] = integerValue;
    }

//now output the values and the sum of the values
displayArray(inputValues, numberOfValues);
cout << "The sum is "
     << sumArray(inputValues, numberOfValues)
     << endl;
     
     //wait until the user is ready before terminating the program
     // to allow the iser to see the program results
     
     system("PAUSE");
     return 0;
}

 //display array - Display the number of members of an array of length
 // sizeOfArray
 
 void displayArray(int integerArray[], int sizeOfArray)
 {
      cout << "The value of the array is: " << endl;
      for (int i = 0; i < sizeOfArray; i++)
      {
          cout.width(3);
          cout << i << ": " << integerArray[i] << endl;
      }
      cout << endl;
 }
 
 //sumArray - return the result of the memnbers of an integer array
 
 int sumArray(int integerArray[], int sizeOfArray)
 {
     int accumulator = 0;
     for (int i = 0; i < sizeOfArray; i++)
     {
         accumulator += integerArray[i];
     }
     return accumulator;
 }