// pgm26
// 11/7/2016
// partially filled arrays
// WITH a while loop. Program counts how many data elts
// are being entered.

#include <iostream>
#include <iomanip>
using namespace std;

const int SIZE=25;

int main()
{
    // allocate an array of size SIZE
    int idnums[SIZE], numelts=0;
    cout << "Enter id number, -1 to finish: " << endl;
    cin >> idnums[numelts]; // numelts is 0

    // read in the values into the array
    while (idnums[numelts] != -1) {

        // Process previous elt (display data)
        cout << "You entered: " << idnums[numelts] << ' ';
        numelts++;
        // structured read loop (read in the next piece of data
        cout << "Enter id number, -1 to finish: " << endl;
        cin >> idnums[numelts];
    }

    cout << "You entered " << numelts << " elements. " << endl;
    cout << "Here is the array: " << endl;
    for (int i=0; i<numelts; i++)
        cout << idnums[i] << endl;
    return 0;
}