Baseball.java

import java.util.Scanner;

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

        // Create an instance of the Scanner class to get user input.
        Scanner s = new Scanner(System.in);

        // Initalize variables for our information
        int singles, doubles, triples, homeRuns, atBats;
        String name;

        // Prompt the user to start, or stop, the program execution by entering the number of singles.
        System.out.println("\nSingles (-1 to end): ");

        // Get the number of singles for the player, from the user.
        singles = s.nextInt();

        // As long as the number of singles is NOT -1, we'll continuously iterate over the code within the while-loop.
        while(singles != -1){

            // Here we simply ask the user to enter the information and store it in the appropriate variables.
            System.out.println("Doubles: ");
            doubles = s.nextInt();

            System.out.println("Triples: ");
            triples = s.nextInt();

            System.out.println("Home runs: ");
            homeRuns = s.nextInt();

            System.out.println("At bats: ");
            atBats = s.nextInt();

            System.out.println("Player name: ");
            s.nextLine(); // clear the input memory buffer!
            name = s.nextLine(); // actually get the name of the player from the user!

            // we now determine the total number of bases by multiplying:
            // - the total number of doubles by 2
            // - the total number of triples by 3
            // - the total number of home-runs by 4
            // and adding them all up.

            int totalBases = (singles) + (doubles * 2) + (triples * 3) + (homeRuns * 4);

            // we then figure out our sluggingPercentage by taking the totalBases, 
            // that we figured out in the previous line, and dividing it by the 
            // total number of atBats. we need to cast atBats to a double however 
            // so we're not performing integer division and losing the decimals
            // from our slugging percentage.

            double sluggingPercentage = totalBases / (double) atBats;

            // we then figure our the batting average by simply adding up the
            // total hits and dividing by the total atBats, which again, must
            // be converted to a double so we can do the division without losing
            // any precision.
            double battingAverage = (singles + doubles + triples + homeRuns) / (double) atBats;

            // next we just output the labeled information to the user

            System.out.printf("\n" + name + "'s Batting Average: %.3f\n", (battingAverage * 100));
            System.out.printf(name + "'s Slugging Percentage: %.3f\n", (sluggingPercentage * 100));

            // we check if singles is not equal to -1

            if (singles != -1){

                // it's not -1 if we're inside of this if statement, so we ask them to start 
                // the loop all over again. if they enter -1, it'll stop the program.

                System.out.println("\nSingles (-1 to end): ");
                singles = s.nextInt();
            }
        }
        
        // all your base are belong to us.
        // https://www.youtube.com/watch?v=jQE66WA2s-A
        
    }
}