蓝桥杯--特殊日期

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题解

 public static void main(String[] args) {
        int[] M = {0,31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
        int year = 1900;
        int month = 1;
        int day = 1;
        int count = 0;
        while (year != 9999 ||month!=12||day!=31){
            if((year%4==0&&year%100!=0)||(year%400==0))
                M[2]=29;
            else
                M[2]=28;
            if (get_sum(year) == get_sum(day) + get_sum(month))
                count++;
            day++;
            if(day>M[month]){
                month++;
                day=1;
            }
            if(month>12){
                year++;
                month=1;
            }
        }
        System.out.println(count);//70910
    }
//获取各位之和
    public static int get_sum(int a) {
        int sum = 0;
        while (a != 0) {
            sum += a % 10;
            a /= 10;
        }
        return sum;
    }