/* WinLoss.java
 * Read a file that contains some win-loss records,
 * and calculate the percentage of games won for each season.
 * Let's assume there are no ties or overtime losses.
 * Each line of the input file will look like num-num (e.g. 13-8).
 * Let's also compute the OVERALL win-loss record.
 * Note: to print a '%' in printf, you need to say %%.
 */
import java.util.Scanner;			// for input
import java.io.FileInputStream;		// for reading files
import java.io.FileNotFoundException;	// in case file doesn't exist!

public class WinLoss
{
  public static void main(String [] args) throws FileNotFoundException
  {
    Scanner inFile = new Scanner(new FileInputStream("winloss.in"));

    // Keep track of total number of wins and losses.
    int totalWins = 0;
    int totalLosses = 0;

    // Keep reading lines until there's no more input.
    while(inFile.hasNext())
    {
      String line = inFile.next();

      // This line has 2 numbers separated by a hyphen.  We need to
      // extract the 2 numbers.  There's more than one way to do this.
      // Let's practice our String functions:
      //   find the location of the hyphen, and use substring to
      //   find the 2 numbers.
      // However, we'll still need to convert from String to integer.
      //   For example to convert "12" to the number 12.
      //   To to this, we'll use Integer.parseInt ( string parameter )

      int hyphenLocation = line.indexOf('-');
      String winString = line.substring(0, hyphenLocation);
      String lossString = line.substring(hyphenLocation + 1);

      int wins = Integer.parseInt(winString);
      int losses = Integer.parseInt(lossString);
      int games = wins + losses;

      // Now we know the number of wins and losses for this season.
      // 1.  Compute and print the percentage of wins.
      // 2.  Keep track of total wins and losses.

      double percent = 100.0 * wins / games;
      System.out.printf("%d-%d winning percentage %4.1f%%\n",
                        wins, losses, percent);

      totalWins = totalWins + wins;
      totalLosses = totalLosses + losses;
    }

    // Now we know the total record of total wins and losses.
    // Need to calculate OVERALL winning percentage too.

    int totalGames = totalWins + totalLosses;
    double overallPercent = 100.0 * totalWins / totalGames;

    System.out.printf("\n%d-%d overall record, percentage is %4.1f%%\n",
                      totalWins, totalLosses, overallPercent);
  }
}