I have setup an array and i have calculated the sum of my array. Now i need to find standard deviation of the numbers entered in my array. here is my code

```
#include <iostream>
using namespace std;
int main()
{
int i=0, count, maxSize = 36;
double arr[36];
double number;
cout << "Enter number ";
cin >> number;
while ((i < maxSize) && (number != -99))
{ arr[i] = number;
i++;
cout << "Enter another number ";
cin >> number;
}
count = i;
cout << "Numbers entered are " << endl;
for (int j = 0; j < count; j++)
cout << arr[j] << " " ;
cout << endl;
double sum = 0;
for ( int i = 0; i < 36; i++ )
sum += arr[i];
cout<<"Average of data is "<< sum / 36 <<endl;
system("pause");
return 0;
}
```