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."。如果大于4，则打印"Too many."。否则，打印"N : Lather and rinse." num_cycles次，其中N是循环号，后跟"Done."。

给定程序的示例输出： 1：起泡并冲洗。 2：起泡并冲洗。完成。

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)

我的代码抛出以下错误，我似乎无法弄清楚如何定义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.')

此行：

    elif num_cyles > 4:

应该是：

    elif num_cycles > 4:

在解决此错误后，错误消失了。因此，其余的语法很好。但是，我进行了一些更改以获取所需的输出：

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

    print('Done')

这将产生：

1 : Lather and rinse
2 : Lather and rinse
Done

因此您可能希望使用<而不是<=，并且在向i加1之前两次将其打印。

Answer 2

存在一些语法错误和不正确的变量。所有内容均已更正，并且代码已通过测试。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 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:
            i += 1
            print (i,": Lather and rinse.")
        print('Done.')

Answer 4

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: 
            i = i + 1 
            print (i,': Lather and rinse.') 
        print('Done.')

shampoo_instructions（2）

Answer 5

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)

作业：使用参数num_cycles编写函数shampoo_instructions（）

5 个答案: