#include <iostream>
using namespace std;

int main()
{
    float score, sum = 0.0f;
    int count = 0;
    
    cout << "Enter the scores, pressing Enter between each score.\n";
    cout << "Enter a negative number when finished.\n";
    
    cin >> score;
    while ( score >= 0.0 ) {
        sum += score;
        count++;
        cin >> score;
    }
    
    cout << "\nThere were " << count << " scores entered.\n";
    cout << "The average score is " << sum / count;
    
    cout << "\n\n"; system( "PAUSE" );
    return( 0 );
}