Question

我必须得到int的用户输入并将它们存储在一个数组中，并在列表中打印最大数字。但我必须创建自己的最大功能。我不确定将什么步骤实现到我的代码中。

def getInt(prompt):
    n = int
    done = False
    while not done:
        try:
            n = int(input(prompt))
        except ValueError:
            print("I was expecting a number, please try again...")
        if n == 0:
            done = True

    return n

def maxNum(l):
    maxi = [0]
    for num in l:
        if maxi > num:
            maxi = num
    return maxi

def result():
    print("The maxium value is: " + maxNum(i))

def main():
    num = []
    i = 0
    done = False
    while not done:
        num = getInt("Please enter an integer < 0 to finish >: ")
        if num == 0:
            done = True
        results = maxNum(i)

Answer 1

以下代码完全符合您的要求。

def getInt(prompt):
    try:
        n = int(input(prompt))
        return n
    except ValueError:
        print("I was expecting a number, please try again...")
        getInt()

def maxNum(lst):
    if not lst:     # if list is empty
        return None

    max_elem = lst[0]
    for x in lst:
        if x > max_elem:
            max_elem = x
    return max_elem


def main():
    nums = []
    while True:
        num = getInt("Please enter an integer < 0 to finish >: ")
        if num == 0:
            break
        nums.append(num)
    result = maxNum(nums)
    print("The maxium value is: " + str(result))

main()

Answer 2

python支持内置max函数

max([1,2,3]) # return 3

并且您的代码完全错误。

如果你想输入整数数组，getInt可能是这样的。

def getInt():
    array = []
    while True:
    x = int(input('message'))
        if x == 0: break
        array.append(x)
    return array

，主要代码为

array = getInt()
max_value = max(array)
print (max_value)

如果你想要自己的最大功能，可以是

def max_func(array):
    max_val = array[0]
    for val in array:
        if val > max_val: max_val = val
    return max_val

Answer 3

以下是maxNum功能的固定版本：

def maxNum(l):
    if not l:
        return None # or return whatever you want if user did not input anything
    maxi = l[0] # it expects 'l' to be an array!
    for num in l[1:]:
        if maxi > num:
            maxi = num
    return maxi

我们还要解决您的getInt功能：

def getInt(prompt):
    while True:
        try:
            return int(input(prompt))
        except ValueError:
            print("I was expecting a number, please try again...")

最后，您的“主要”功能需要以下修复：

def main():
    num = []
    n = 1
    while n != 0:
        n = getInt("Please enter an integer < 0 to finish >: ") # store user input into n - do not overwrite num!
        num.append(n) # append each user value to the list num
    results = maxNum(num) # pass the entire *list* to maxNum

如何显示我在python中创建的最大函数

3 个答案: