输入4 (repeat=4) 0 (in=0) 23456 (in=23456) -100 (in=-100) -1 (in=-1) 输出count = 1, sum = 0 (0的位数是1, 各位数字之和是0)count = 5, sum = 20 (23456的位数是5, 各位数字之和是20)count = 3, sum = 1 (-100的位数是3, 各位数字之和是1)count = 1, sum = 1 (-1的位数是1, 各位数字之和是1)