Thread: why won't this work

Code:

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

int average, sd, s1, s2, s3, s4, deviation;

int main()
{
	cout << "Press enter after entering a value.\n";
	cout << endl;
	cout << "Enter score one: ";
	cin >> s1;
	cout << "\nEnter score two: ";
	cin >> s2;
	cout << "\nEnter score three: ";
	cin >> s3;
	cout << "\nEnter score four: ";
	cin >> s4;
	cout << "\nThe average of your four scores is "<<average<<".\n";
	cout << "The stand deviation of your scores is "<<sd<<".\n";

	average =(s1+s2+s3+s4)/4;
	deviation =(((s1-average)*
		(s1-average))+((s2-average)*
		(s2-average))+((s3-average)*
		(s3-average))+((s4-average)*
		(s4-average)))/3;
	sd = sqrt(deviation);

	return 0;
}

[code][/code]tagged by Salem