求s=a+aa+aaa+aaaa+aa…a的值,其中a是一个数字。例如2+22+222+222…2(此时共有5个数相加),几个数相加有键盘控制。需求:求s=a+aa+aaa+aaaa+aa…a的值,其中a是一个数字。思路:先计算出每一项的值。Tn = 0Sn = []n = int(input(‘n = :’))a = int(input(‘a = :’))for count in range(n
A. a = a * 10
B. a = a + 10
C. a = a // 10
D. a = a * *10
输入某年某年某月某日,判断这一天是这一年的第几天?思路:以3月5日为例,应该先把前两个月的加起来,然后再加上5天即本年的第几天,特殊情况,闰年且输入月份大于3时需考虑多加一天:year = int(input(‘year:’))month = int(input(‘month:’))day = int(input(‘day:’))months = [0,31,59,90,120,151,181,2
A. (year % 400 == 0) or ((year % 4 == 0) and (year % 100 != 0))
B. (year % 400 = 0) or ((year % 4 = 0) and (year % 100 != 0))
C. (year % 400 == 0) and ((year % 4 == 0) and (year % 100 != 0))
D. (year % 400 == 0) and ((year % 4 == 0) or (year % 100 != 0))