Simple program that needs tweaking

[f0rumh4x]

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

int main()
{
	//declare variables
	short numberOfTests = 0;
	short testScores = 0;
	short scoreGrade = 0;
	short sum = 0;
	short testNumber = 1;
	double averageScore = 0.0;

	do //begin loop
	{
		cout << "Enter the number of tests: ";
		cin >> numberOfTests;
		
		if (numberOfTests >= 1 && numberOfTests <= 100)
			cout << "You entered " << numberOfTests << " as the number of tests. " << endl;
		else
			cout << "The number must be between 1 and 100 (inclusive). ";
		//end if
	} while (numberOfTests < 1 || numberOfTests > 100);

	testScores = numberOfTests;
	
	while (numberOfTests > 0)
	{
		cout << "Enter the score for test #" << testNumber << ": " << endl;
		cin >> scoreGrade;

		if (scoreGrade >= 0 && scoreGrade <= 100)
		{
			//update accumulator and counter
			sum += scoreGrade;
			testNumber += 1;
			numberOfTests -= 1;
		}
		
		cout << "You must enter a valid number between 0 and 100 (inclusive) as a score. ";
	} //end while

	averageScore = sum / testScores;
	cout << "There were a total of " << testScores << " test scores. " << endl;
	cout << "The average of all the test scores is: " << averageScore << endl;

cin.get();
return 0;
} //end of main function