Python十个实例(二)

0x00 判断奇偶

while True:
    try:
        num = int(input("请输入一个整数："))
    except ValueError:
        print("输入的不是整数！")
        continue

    if num%2 == 0:
        print("这是一个偶数!")
    else:
        print("这是一个奇数！")
    break

0x01 判断闰年

year = int(input("请输入一个年份："))

if (year % 4) == 0 and (year % 100) != 0 or (year % 400) == 0:
    print("%d是闰年" % year)
else:
    print("%d不是闰年" % year)

0x02 比较大小

while True:
    try:
        N = int(input("请输入需要比较的数字个数："))
        print("请输入需要对比的数字：")
        num = []

        for i in range(1,N+1):
            temp = int(input("输入第%d个数字：" % i))
            num.append(temp)

        print("您输入的数字为：", num)
        print("最大值为：", max(num))
        break
    except ValueError:
        print("输入有误！")

0x03 判断质数

while True:
    try:
        num = int(input("请输入一个数字: "))
         
        if num > 1:
           for i in range(2,num):
               if (num % i) == 0:
                   print(num,"不是质数")
                   print(i,"乘",num//i,"等于",num)
                   break
           else:
               print(num,"是质数")      
        else:
           print(num,"不是质数")
        break
    except ValueError:
        print("输入有误！")

0x04 输出指定范围内的质数

while True:
    try:
        min = int(input("输入区间最小值："))
        max = int(input("输入区间最大值："))
        print(min,"和",max,"之间的质数有：")

        for n in range(min,max + 1):
            if n > 1:
                for i in range(2,n):
                    if(n % i) == 0:
                        break
                else:
                    print(n)
        break
    except ValueError:
        print("输入有误！")

0x05 输出阶乘

while True:
    try:
        n = int(input("请输入一个数字："))
        factorial = 1

        if n < 0:
            print("Sorry,负数没有阶乘！")
        elif n == 0:
            print("0的阶乘为1")
        else:
            for i in range(1,n+1):
                factorial = factorial * i
            print("%d的阶乘为%d" % (n,factorial))
        break
    except ValueError:
        print("输入有误！")

0x06 九九乘法表

for i in range(1,10):
    for j in range(1,i+1):
        if i == j:
            print("{1}*{0}={2}".format(i, j, i*j))
        else:
            print("{1}*{0}={2}".format(i, j, i*j),end='\t')

0x07 斐波那契数列

def fib(n):
    a,b = 0,1
    for i in range(n+1):
        a,b = b,a+b
    return a

while True:
    try:        
        N = int(input("请输入要生成数列的项数："))
        if N <= 0:
            print("请输入正整数！")            
        else:
            for i in range(N):
                print(fib(i),end=' ')
        break
    except ValueError:
        print("输入有误！")

0x08 阿姆斯特朗数

while True:
    try:        
        num = int(input("请输入一个正整数："))
        if num <= 0:
            print("输入有误!")
            continue

        sum = 0

        n = len(str(num))

        temp = num
        while temp > 0:
            digit = temp % 10
            sum += digit ** n
            temp //=10

        if num == sum:
            print("%d是阿姆斯特朗数" % num)
        else:
            print("%d不是阿姆斯特朗数" % num)
        break

    except ValueError:
        print("输入有误！")

0x09 进制转换

while True:
    try:
        temp = int(input("请输入数字： "))

        print("十进制数为：",temp)
        print("二进制数为：",bin(temp))
        print("八进制数为：",oct(temp))
        print("十六进制数为：",hex(temp))
        break
    except ValueError:
        print("输入有误！")