( 游戏：挑一张牌）编写程序，模拟从一副 S2 张的牌中选

    public static void main(String[] args) {
        String[] size = new String[]{"Ace","2","3","4","5","6","7","8","9","10","Jack","Queen","King"};  
        String[] suit = new String[]{"Clubs","Diamonds","Hearts","Spades"};
        int index = (int)(Math.random() *13); 
        int flag= (int)(Math.random() *4); 
        System.out.println("The card you pick is " + size[index] + " of " + suit[flag]);
    }