working with arrays

I am writing a program that creates an int array, takes ints from the user, and determines the min, max and average of all values. This part I can do. What I am having trouble with is that the values entered can only be positive. So if the user enters a negative number I have to send an error message to the screen saying int must be positive, which I have done already. I can't figure out how to keep from counting that value in my counter and not include the negative number in my calculations for the minimum.

Here is the code:

Code:

 #include <iostream>

 using namespace std;

 int main()
 {
	 int nums[100];
	 int i, max, min, total =0, count = 1;
	 double avg;

	 cout << "Enter positive interger numbers (or -1 to quit): " << endl;
	 cin >> nums[0];
	 if (nums[0] == -1)
	 	 	{
	 			cout << "Bye.";
	 			return 0;
	 		}
	 	if (nums[0] < -1)
	 	cout << "********ERROR SKIPPED ENTRY********" << endl << "Number must be positive";

	 max = nums[0];
	 min = nums[0];
	 total = nums[0];

while (i > -1)
{
	 for (i = 1; i < 100; i++)
	{
		cin >> nums[i];

	if (nums[i] < -1)
	 {
		cout << "********ERROR SKIPPED ENTRY********" << endl << "Number must be positive";
		count = count -1;
		total = total - i;
	 }

	 if (nums[i] == -1)
	 {
	 	cout << "Read in " << i << " values." << endl;
	 	cout << "Minimum value: " << min << endl;
		cout << "Maximum value: " << max << endl;
		cout << "Average: " << (total +1) / i << endl;
		cout << count << endl;
		cout << total;
	 	return 0;
	}
	 else
	{
		if (nums[i] > max)
		 max = nums[i];

		if (nums[i] < min)
		 min = nums[i];

		 count ++;
		 total = nums[i] + total;
	}
}
}
 return 0;
 }

Thanks for any help.

You could do a do/while loop like so:

Code:

do
{
    cin>>nums[i];
} while (nums[i]<-1);