Game of dice in java

Question

The requirements of the program are: Antonia and David are playing a game.

Each player starts with 100 points.

The game uses standard six-sided dice and is played in rounds. During one round, each player rolls one die. The player with the lower roll loses the number of points shown on the higher die. If both players roll the same number, no points are lost by either player.

Write a program to determine the final scores.

I came up with the following code:

import java.util.*;
public class prob3 
{
    public static void main(String[]args)
{
        Random g=new Random();
        int a,b,c;
        int rounds;
        int antonio=100;
        int david=100;

        Scanner s=new Scanner(System.in);
        System.out.println("Please enter the no. of rounds you want to play(1-15):  ");
        rounds=s.nextInt();


        for(int d=1;d<=rounds;d++)
        {
        a=g.nextInt(6)+1;
        b=g.nextInt(6)+1;
        System.out.println("Round "+d+":"+a+" "+b);

        if(a<b)
        antonio=100-b;

        else if(a>b) 
        david=100-a;
        }
        System.out.println("Total for Antonio: "+antonio);
        System.out.println("Total for David: "+david);
        }
        }

The program fails to calculate the right sum at the end. What am I doing wrong? Any help would be appreciated. Thanks.

Answer 1

As stated above the "100 - b" was your main problem. But there is no reason in your problem statement to set a number of rounds.

I whould rather use a loop like this:

while(antonio >= 0 && david >= 0){
    //do the same stuff here
}
System.out.println...

Since it looks as some exercise for some java course.. This may sound useless but:

• Format always your code.. Spaces, brakets and tabs
• Use descriptive variable mames. a b c d are not quite intuitive in a larger program.
• Remover unused variables

Y mucha suerte tío!

Answer 2

You are doing this.

 antonio=100-b;

When you probably want

antonio = antonio - b;

The first code simply subtracts the dice roll from 100 every time, which is pointless. You want to subtract the dice roll from the players totals. Do this for both players.