#include <iostream>

    using namespace std;

	int score;

	int getScore()
	// Purpose:		get test score input from user
	// Parameters:	none
	// Returns:		returns values of the test score's
	{
        cout << "Please enter a test score: ";
        cin >> score;
        while(score < 0 || score > 100)
		    {
            cout << "You have entered an invalid test score." << endl;
            cout << "Please enter a test score: ";
            cin >> score;
            }

        return score;
    }

    int findLowest(int one, int two, int three, int four)
	// Purpose:		finds the lowest test score out of the four
	// Parameters:	int one, int two, int three, int four (test scores)
	// Returns:		returns top 3 values
	{
        int num = one;
        if(num > two) {
               num = two;
        }
        if(num > three) {
               num = three;
        }
        if(num > four) {
               num = four;
        }
        return num;
    }

    float calcAverage(int one, int two, int three, int four)
	// Purpose:		calculates average of the top three test scores
	// Parameters:	int one, int two, int three, int four (test scores)
	// Returns:		returns value of the test score's average
	{
	float total =(float)( (one + two + three + four) - findLowest(one, two, three, four));
	float avg = total/3;
	return avg;
	}

    void displayResults(int one, int two, int three, int four, float average)
	// Purpose:		calculates average of the top three test scores
	// Parameters:	int one, int two, int three, int four (test scores) & float average
	// Returns:		scores used in the average, score that was dropped
	{
         cout << endl << "The average mark from the given set of results was " << (float) average << "." << " The score that was" << endl << "dropped was " <<
			 findLowest(one, two, three, four) << ". The scores used were: " << one << " " << two << " " << three << " and " << four << endl;
    }

    int main()
    {
        int test1 = getScore();
        int test2 = getScore();
        int test3 = getScore();
        int test4 = getScore();

        float average = calcAverage(test1, test2, test3, test4);

        displayResults(test1, test2, test3, test4, average);

        system("pause");
        return 0;
    }