前言

最近在上Python课。简单记录一下自己这些习题的答案。

正文

7-1 密码校验

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passwd = input()
if passwd == "654321":
    print("欢迎使用本系统！")
else:
    print("密码错误，退出系统！")

7-2 判断闰年

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in_n = input()
n = int(in_n)
if ((n % 4 == 0) and (n % 100 != 0)) or (n % 400 == 0) :
    print(str(in_n) + "年是闰年。")
else:
    print(str(in_n) + "年不是闰年。")

7-3 字符判断

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inp = input()
if len(inp) > 1:
    print("输入字符个数有误！")
else:
    if inp.isdigit():
        print("%s是%s。" % (inp,"数字"))
    elif inp.isupper():
        print("%s是%s。" % (inp,"大写英文字母"))
    elif inp.islower():
        print("%s是%s。" % (inp,"小写英文字母"))
    else:
        if inp[2:].isdigit():
            print("%s是%s。" % (inp,"数字"))
        else:
            print("%s是%s。" % (inp,"其他字符"))

7-4 百分制

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inp = input()
iinp = eval(inp)
if (iinp >= 90 and iinp <= 100):
    print("%s对应的等级为%s。" % (inp, "优秀"))
elif (iinp >= 80 and iinp < 90):
    print("%s对应的等级为%s。" % (inp, "良好"))
elif (iinp >= 70 and iinp < 80):
    print("%s对应的等级为%s。" % (inp, "中等"))
elif (iinp >= 60 and iinp < 70):
    print("%s对应的等级为%s。" % (inp, "及格"))
elif (iinp < 60 and iinp >= 0):
    print("%s对应的等级为%s。" % (inp, "不及格"))
else:
    print("%s对应的等级为%s。" % (inp, "无，输入错误"))

7-5 遍历

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inp=input()
for c in inp:
    print(c)

7-6 飞花令

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keyw = input()
src = input()
if keyw in src:
    print("恭喜！您的回答正确，包含%s个'%s'。" % (str(src.count(keyw)), keyw))
else:
    print("很遗憾！您的回答有误！")

7-7 累加

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inp = input()
total = 0
print("1+2+3+...+",end="")
for i in range(1,int(inp)+1):
    if i!=int(inp):
        total += i
    else:
        print(str(i) + "=",end="")
        total += i
print(total)

7-8 吃桃

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def do_it(src):
    res = (src+1) * 2
    return res
prog=1
for i in range(9,0,-1):
    prog = do_it(prog)
    if i != 1:
        print("第%s天剩下的%s个桃子" % (str(i), str(prog)))
    else:
        print("第%s天剩下的%s个桃子" % (str(i), str(prog)),end="")

7-9 累加变体

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inp = input()
total = 0
for i in range(1,int(inp)+1):
    if i!=int(inp):
        print(str(i) + "+",end="")
        total += i
    else:
        print(inp + " = ",end="")
        total += i
print(total)

7-10 水仙花

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target = input()
sum = 0
for c in target:
    sum += int(c) ** 3
if sum == int(target):
    print(target + " 是水仙花数。")
else:
    print(target + " 不是水仙花数。")

7-11 水仙花变体

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target = input()
sum = 0
if not target.isdigit():
    print("输入错误，必须输入三位数字。")
else:
    if len(target) != 3:
        print("输入错误，必须输入三位。")
    else:
        for c in target:
            sum += int(c) ** 3
        if sum == int(target):
            print(target + " 是水仙花数。")
        else:
            print(target + " 不是水仙花数。")

7-12 吃桃变体

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def do_it(src):
    res = (src+1) * 2
    return res
prog=1
for i in range(9,0,-1):
    prog = do_it(prog)
    if i != 1:
        pass
        # print("第%s天剩下的%s个桃子" % (str(i), str(prog)))
    else:
        print("第%s天剩下的%s个桃子" % (str(i), str(prog)),end="")

7-13 吃桃变体2

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def do_it(src):
    res = (src+1) * 2
    return res
days,prog=input().split(",")
days=int(days)
prog=int(prog)
for i in range(days-1,0,-1):
    prog = do_it(prog)
    if i != 1:
        pass
        # print("第%s天剩下的%s个桃子" % (str(i), str(prog)))
    else:
        print("第%s天摘了%s个桃子" % (str(i), str(prog)))

7-14 校验码

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idn = input()
if len(idn) != 17:
    print("身份证号码位数有误！")
else:
    indexes = [7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2]
    respective = list(idn)
    sum = 0
    for i in range(len(respective)):
        sum += int(respective[i]) * indexes[i]
    modu = sum % 11
    id_map = {
        0:'1',
        1:'0',
        2:'X',
        3:'9',
        4:'8',
        5:'7',
        6:'6',
        7:'5',
        8:'4',
        9:'3',
        10:'2'
    }
    res = id_map.get(modu)
    print("校验码为 " + res)
    print("完整的身份证号码为 " + idn +res, end="")

7-15 进制转换

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ipt,ipf = input().split(",")
r=int(ipf)
m=int(ipt)
t=''
while m!=0 and r!=0:
    c = m % r
    if c>9:
        t=chr(c-10+65)+t
    else:
        t=str(c)+t
    m=m//r
print("将{}转换为{}进制的结果为:{}".format(ipt,r,t))

7-16 水仙花最终变体

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nacrissa = []

def do_nacrissus(target):
    sum = 0
    for c in target:
        sum += int(c) ** 3
    if sum == int(target):
        nacrissa.append(target)
        return True
    return False

for i in range(100,999+1):
    do_nacrissus(str(i))

for nacrissus in nacrissa:
    print(nacrissus + "    ",end="")