//---------------------------------------------------------
// Filename: CountLoop.cpp
//
// Purpose: Find the average of a list of values. The
// values are entered by the user.
//
// This program was written to illustrate a count controlled
// loop.
//
// D. Searls
// Asbury College
// Sep 2006
//---------------------------------------------------------
#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
    int numValues; // Number of values
    int count;     // Number of values processed so far
    double x;      // A single value from list
    double sum;    // Sum of values
    double avg;    // The arithmetic average
    
    // Get number of scores
    
    cout << "Enter the number of values in the list: ";
    cin >> numValues;
    cout << endl;
   
    // Initialize sum and counter
   
    sum = 0.0;
    count = 0;
    
    // Read scores, maintaining a running total and counter
    
    while (count < numValues)
    {
        count = count + 1;
        cout << "Enter score " << count << ": ";
        cin >> x;
        sum = sum + x;
    }
    cout << endl;
    
    // Calculate average
    
    if (numValues > 0)
    {
        avg = sum/(double)numValues;
    }
    
    // Display results
    
    if (numValues > 0)
    {
        cout << "Number of scores read: " << numValues << endl;
        cout << "Sum of scores: " << sum << endl;
        cout << fixed << setprecision(2) ;
        cout << "Average score: " << avg;
    }
    else
    {
        cout << "The list contained no scores.";
    }
    cout << endl << endl;
    return 0;
}

//---------------------------------------------------------
// Filename: SentinelLoop.cpp
//
// Purpose: Find the average of a list of values. The
// values are entered by the user.
//
// This program was written to illustrate a sentinel
// controlled loop.
//
// D. Searls
// Asbury College
// Sep 2006
//---------------------------------------------------------
#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
    int numValues; // Number of values
    double x;      // A single value from list
    double sum;    // Sum of values
    double avg;    // The arithmetic average
    
    // Display instructions
    
    cout << "Enter the values in the list. Enter a negative value when you are done.";
    cout << endl << endl;
    
    // Initialize sum and counter
    
    sum = 0.0;
    numValues = 0;
    
    // Read scores, maintaining a running total and counter
    
    cout << "Enter first score (negative to terminate): ";
    cin >> x;
    while (x >= 0)
    {
        numValues = numValues+1;
        sum = sum + x;
        cout << "Enter next score (negative to terminate): ";
        cin >> x;
    }
    cout << endl;
    
    // Calculate average
    
    if (numValues > 0)
    {
        avg = sum/double(numValues);
    }
    
    // Display results
    
    if (numValues > 0)
    {
        cout << "Number of scores read: " << numValues << endl;
        cout << "Sum of scores: " << sum << endl;
        cout << fixed << setprecision(2) ;
        cout << "Average score: " << avg;
    }
    else
    {
        cout << "The list contained no scores.";
    }
    cout << endl << endl;
    return 0;
}