Python 3.x 在数字a、b、c中最大

毫无疑问，greater1,1可能返回equal，因此您随后调用greatestequal，1,1，使您将字符串与整数进行比较。

您尝试将字符串equal与1进行比较，而不是equal，您可以返回a或b，因为它们具有相同的值。

def greater(a,b):
    if a > b:
        return a
    elif a==b:
        return "equal"
    else:
        return b

def greatest(a,b,c):

    if a>b and a>c:
        return 'a'

    elif a==b and a==c:
        return "equal"

    elif b > a and b > c:
        return b

    elif b==a and b==c:
        return "equal"

    elif c==a and c==b:
        return "equal"

    else:
        return c

bigger = greater(1,1)        
biggest = greatest(bigger,1,1)
print(biggest)


error:Traceback (most recent call last):
  File "functions_execrise2.py", line 30, in <module>
    biggest = greatest(bigger,1,1)
  File "functions_execrise2.py", line 11, in greatest
    if a>=b and a>=c:
TypeError: '>=' not supported between instances of 'str' and 'int'