/* 

This is a program that asks the user for a positive integer n, and computes the sum of the squares of all numbers up to n.

Laura  Toma
csci 101
*/


public class SumSquares {
	
	public static void main (String args[]) {

		//set up reading from user
		ReadStream r = new ReadStream(); 
		
		//read an integer from user
		int n; 
		System.out.print("Please enter a positive integer: ");
		n = r.readInt(); 
		r.readLine();
		//assume n is indeed positive

		int i, sum; //sum will hold the sum
		i = 0;
		sum = 0; 
		while (i <= n) {
			sum = sum + i*i;
			i = i+1; 
		}

		System.out.println("Sum of squares of all numbers up to " + n 
						   + " is " + sum);
		System.out.println("Goodbye.");
		
	} //end of main
	
} // end of class