Thread: [SOLVED][Beginner] Arithmetic Question, Why does product become negative after a certain point?

Here is the problem:
Write an application that inputs three integers from the user and displays the sum, average, product, smallest, and largest of the numbers. Note: Calculation of average in this exercise should result in an integer representation of average without repeating decimals.

Here is my code:

//Exercise 2.17 from Deitel 
// Write an application that inputs three integers and displays sum, average, product, smallest, and largest of numbers 
//Average calculations should not have a repeating decimal
 
import java.util.Scanner; //Java utilities package import statement
 
public class Average 
{
	//main method for application
	public static void main (String [] args)
	{
		Scanner input = new Scanner(System.in); //Scanner input from user
 
		int number1, number2, number3, sum, average, product, smallest, largest; 
 
		System.out.print( "Enter the first integer: " ); //prompt for number1 
		number1 = input.nextInt(); 
 
		System.out.print( "Enter the second integer: " ); //prompt for number2
		number2 = input.nextInt();
 
		System.out.print( "Enter the third integer: " ); //prompt for number3
		number3 = input.nextInt();
 
		sum = number1 + number2 + number3; 
 
		average = (number1 + number2 + number3) / 3;
 
		product = number1 * number2 * number3; 
 
		System.out.printf( "Sum = %d \nAverage = %d \nProduct = %d \n", sum, average, product );
 
		if (number1 < number2 && number1 < number3) //if number1 is smallest
			System.out.println( number1 + " is smallest"); 
 
		if (number2 < number1 && number2 < number3) //if number 2 is smallest
			System.out.println( number2 + " is smallest");
 
		if (number3 < number1 && number3 < number2) //if number3 is smallest
			System.out.println( number3 + " is smallest");
 
		if (number1 > number2 && number1 > number3) //if number1 is largest
			System.out.println( number1 + " is largest"); 
 
		if (number2 > number1 && number2 > number3) //if number 2 is largest
			System.out.println( number2 + " is largest");
 
		if (number3 > number1 && number3 > number2) //if number3 is largest
			System.out.println( number3 + " is largest");
 
	} //end main method
} //end Average class

When I run the program with smaller numbers like 60, 30, 50 then the program runs fine. Once
I start entering 349284, 409823409, 123980128 as my integers then I get a negative product. I wish I could provide the cut off point for when I start seeing the negative product printed but I don't actually know. I tested 100,000 for all three integers and the product was negative again so I'm assuming anything greater than 100,000.

This maybe silly question but please let me know if I'm doing something wrong. Thanks!!

Also! I'm new please let me know if this question should be posted in a different section or on a different forum in general.

Originally Posted by beibixx

I wish I could provide the cut off point for when I start seeing the negative

An int can only hold a value so big

System.out.println(Integer.MAX_VALUE);
System.out.println(Integer.MAX_VALUE + 1);

Originally Posted by beibixx

This maybe silly question but please let me know if I'm doing something wrong. Thanks!!

Nothing wrong with undirected discovery. Hit up your favorite search engine and see what you can find about it

Thanks guys! I will also Google