技術標籤：java

Java猜數小遊戲，下面分別用了兩種迴圈方式實現

do-while：

 Scanner scanner = new Scanner(System.in);
        Random random = new Random();
        int ranNum = random.nextInt(10);//隨機數範圍
        int count=0;//計數
        do {
            System.out.println("輸入猜測數字：");
            int guessNum = scanner.nextInt
 
();
            if (guessNum==ranNum){
                System.out.println("恭喜猜對了√");
                break;
            }else if (guessNum>ranNum){
                System.out.println("猜大了,再猜");
                count++;
                if (count>3){
                    System.
 
out.println("下次再來吧");
                }
            }else {
                System.out.println("太小了，再猜");
                count++;
                if (count>3){
                    System.out.println("下次再來吧");
                }
            }
        }while (count<
 
4);
}

for:

Scanner scanner = new Scanner(System.in);
        Random random = new Random();
        int ranNum = random.nextInt(10);//隨機數範圍
        System.out.println("輸入猜測數字：");
        int guessNum = scanner.nextInt();
        for (int i = 0; i <4 ; i++) {
            if (guessNum==ranNum){
                System.out.println("恭喜猜對了√");
                break;
            }else if (guessNum>ranNum){
                System.out.println("猜大了,再猜");
                guessNum = scanner.nextInt();
            }else {
                System.out.println("太小了，再猜");
                guessNum = scanner.nextInt();
            }
        }
        System.out.println("下次再來");
    }

效果展示：