Introduction to Java Programming编程题5.29<掷骰子游戏>

/*

You rolled 2 + 1 = 3
You lose

You rolled 1 + 4 = 5
Point is 5
You rolled 5 + 1 = 6
You rolled 5 + 1 = 6
You rolled 1 + 5 = 6
You rolled 6 + 3 = 9
You rolled 1 + 4 = 5
You win

You rolled 5 + 2 = 7
You win

You rolled 5 + 4 = 9
Point is 9
You rolled 4 + 3 = 7
You lose

You rolled 6 + 5 = 11
You win
*/
public class GameDice {
public static void main(String[] args) {
int a, b, sum1 = 0, count = 0, sum2 = 0;
while (true) {
a = (int)(Math.random() * 6 + 1);
b = (int)(Math.random() * 6 + 1);
sum1 = a + b;
System.out.println("You rolled " + a + " + " + b + " = " + sum1);
if (count++ == 0) {
if (firstDice(sum1)) {
sum2 = sum1;
continue;
}
else
break;
}
if (isWin(sum1, sum2))
break;
}
}

public static boolean firstDice(int sum) {
if (sum == 3 || sum == 12)
System.out.println("You lose");
else if (sum == 7 || sum == 11)
System.out.println("You win");
else {
System.out.println("Point is " + sum);
return true;
}

return false;
}

public static boolean isWin(int sum1, int sum2) {
if (sum2 == sum1)
System.out.println("You win");
else if (sum1 == 7)
System.out.println("You lose");
else
return false;

return true;
}
}