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  • 回数

     题目:一个5位数,判断它是不是回文数。即12321是回文数,个位与万位相同,十位与千位相同。 

            int num = 0;
            Scanner scanner = new Scanner(System.in);
            num = scanner.nextInt();
            String numString = Integer.toString(num);
            char[] numArr = numString.toCharArray();
            int endIndex = numArr.length-1;
            boolean flag = true; //
            for (int i = 0; i <= endIndex; i++) {
                if (i==endIndex||i>endIndex) {
                    break;
                }
                if(numArr[i]!=numArr[endIndex]){
                    flag = false;
                    break;
                }
                endIndex-=1;
            }
            if (flag) {
                System.out.println("是回数");
            }else {
                System.out.println("不是回数");
            }

    源码

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  • 原文地址:https://www.cnblogs.com/aeolian/p/7856235.html
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