家庭作业:用参数shampoo_instructions()编写函数num_cycles

Question

问题:编写带有参数shampoo_instructions()的函数num_cycles。如果num_cycles小于1，则打印"Too few."。如果超过4，打印"Too many."。否则，打印"N : Lather and rinse." num_cycles times，其中N是循环数，后面是"Done."。

给定程序的样本输出:1:泡沫和漂洗。2:泡沫和漂洗。好了。

我的代码：

    def shampoo_instructions(num_cycles):
    if num_cycles < 1:
        print ('Too few.')
    elif num_cyles > 4:
        print ('Too many.')
    else:
        i = 0
        while i<=num_cycles:
            i = i + 1
            print (i+1,": Lather and rinse")

    print ('Done')

shampoo_instructions(2)

我的代码抛出了下面的错误，我似乎不知道如何定义num_cycles。

Traceback (most recent call last):   File "main.py", line 14, in 
shampoo_instructions(2)   File "main.py", line 4, in shampoo_instructions
elif num_cyles > 4: NameError: global name 'num_cyles' is not defined

Answer 1

def shampoo_instructions(num_cycles):
    if num_cycles < 1:
        print ('Too few.')

这一行：

    elif num_cyles > 4:

应：

    elif num_cycles > 4:

在修正之后，错误就消失了。所以其余的在语法上都很好。但是，为了获得所需的输出，我做了一些更改：

        print ('Too many.')
    else:
        i = 0
        while i<num_cycles:
            print (i+1,": Lather and rinse")
            i = i + 1

    print('Done')

这就产生了：

1 : Lather and rinse
2 : Lather and rinse
Done

因此，您可能需要<而不是<=，并且在打印之前，您在i中添加了两次1。

Answer 2

有几个语法错误和不正确的变量。所有这些都已被修正，代码已经过测试。干杯!

def shampoo_instructions(num_cycles):
    if num_cycles < 1:
        print ('Too few.')
    elif num_cycles > 4:
        print ('Too many.')
    else:
        i = 0
        while i < num_cycles:
            print (i+1,": Lather and rinse.")
            i = i + 1

        print('Done.')

shampoo_instructions(2)

Answer 3

def print_shampoo_instructions(num_cycles):    
    if num_cycles < 1:
        print ('Too few.')
    elif num_cycles > 4:
        print ('Too many.')
    else:
        n = 0
        while n != num_cycles:
            n = n + 1
            print ( n ,': Lather and rinse.')
       
        
        print ('Done.')

user_cycles = int(input())
print_shampoo_instructions(user_cycles)