题目：给一个不多于5位的正整数，要求：一、求它是几位数，二、逆序打印出各位数字。 x = int(input("input a number:")) a = x // 10000 ________________ c = x % 1000 // 100 d = x % 100 // 10 e = x % 10 if a != 0: print ("there are 5 ",e,d,c,b,a) elif b != 0: print ("there are 4 ",d,c,b,a) elif c != 0: print ("there are 3 ",e,d,c) elif d != 0: print ("there are 2 ",e,d) else: print ("there are 1",e)
（A）b = x // 10000 // 1000
（B） b = x % 10000 // 1000
（C）b = x // 10000 % 1000
（D）b = x % 10000 % 1000
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