//---------------------------------------------------
// Purpose: Calculate mean and variance of five input values
// Author:  John Gauch
//---------------------------------------------------
#include <cmath>
#include <iostream>
using namespace std;

int main()
{
   // Local variable declarations
   float Val1=0, Val2=0, Val3=0, Val4=0, Val5=0;

   // Read input parameters
   cout << "Enter 5 numbers\n";
   cin >> Val1 >> Val2 >> Val3 >> Val4 >> Val5;
   cout << "data = " << Val1 << " " << Val2 << " " 
        << Val3 << " " << Val4 << " " << Val5 << endl;

   // Calculate mean
   float Mean = (Val1 + Val2 + Val3 + Val4 + Val5) / 5;

   // Calculate variance
   float Variance = (Val1 - Mean) * (Val1 - Mean)
                  + (Val2 - Mean) * (Val2 - Mean)
                  + (Val3 - Mean) * (Val3 - Mean)
                  + (Val4 - Mean) * (Val4 - Mean)
                  + (Val5 - Mean) * (Val5 - Mean);
   Variance = Variance / 5;

   // Print statistics
   cout << "mean = " << Mean << endl; 
   cout << "variance = " << Variance << endl; 
   return 0;
}