/*LuckySevens.java
Simulate the game of lucky sevens until all funds are depleted.
1) Rules:
        roll two dice
        if the sum equals 7, win $4, else lose $1
2) The inputs are:
        the amount of money the user is prepared to lose 
3) Computations:
        use the random number generator to simulate rolling the dice
        loop until the funds are depleted 
        count the number of rolls
        keep track of the maximum amount
4) The outputs are:
        the number of rolls it takes to deplete the funds
        the maximum amount 
*/

import java.util.Scanner;
import java.util.Random;

public class LuckySevens {
   public static void main (String [] args) {
  
      Scanner reader = new Scanner(System.in);
      Random generator = new Random();
   
      int die1, die2,       // two dice
          dollars,          // initial number of dollars (input)
          count,            // number of rolls to reach depletion
          maxDollars,       // maximum amount held by the gambler
          countAtMax;       // count when the maximum is achieved

      // Request the input
      System.out.print("How many dollars do you have? ");
      dollars = reader.nextInt();
   
      // Initialize variables
      maxDollars = dollars;
      countAtMax = 0;
      count = 0;
   
      // Loop until the money is gone   
      while (dollars > 0){
         count++;
     
         // Roll the dice.
         die1 = generator.nextInt (6) + 1; // 1-6 
         die2 = generator.nextInt (6) + 1; // 1-6
     
         // Calculate the winnings or losses
         if (die1 + die2 == 7)
            dollars += 4;
         else 
            dollars -= 1; 

      
         // If this is a new maximum, remember it  
         if (dollars > maxDollars){
            maxDollars = dollars;
            countAtMax = count;
         }
      }
   
      // Display the results
      System.out.println 
         ("You are broke after " + count + " rolls.\n" +
          "You should have quit after " + countAtMax +
          " rolls when you had $" + maxDollars + ".");
   }
}