Question

Intro to Programming in Java

Elements of Programming Book Problem 1.3.25

1.3.25 .) Modify Gambler to take an extra command-line argument that specifies the (fixed) probability that the gambler wins each bet. Use your program to try to learn how this probability affects the chance of winning and the expected number of bets. Try a value of p close to 0.5 (say, 0.48)

public class Gambler
{
public static void main(String[] args)
{
   int stake = Integer.parseInt(args[0]);
   int goal = Integer.parseInt(args[1]);
   int trials = Integer.parseInt(args[2]);
  
   for (int sample = 0; sample < 10; sample++)
   {
   int bets = 0;
   int wins = 0;
  
   for (int t = 0; t < trials; t++)
   {
       int cash = stake;
       while (cash > 0 && cash < goal)
       {
       bets++;
       if (Math.random() < 0.5)
           cash++;
       else
           cash--;
       }
       if (cash == goal)
   }
   System.out.println(100*wins/trials + "% wins");
   System.out.println("Avg # bets: "+bets/trials);
   }

}

}

Answer 1

Highlighted are the only changes in the code you provided

• Taken one more command line argument prob
• used it in increasing the winning chance