Question

我正在尝试编写一个基本代码，提示用户输入数字列表作为单独的输入，然后识别最大和最小数字。如果用户输入的不是数字，则代码应返回“无效输入”消息。该代码似乎在两个输入中都运行了一次，但是while输入似乎被完全破坏了，我不确定它出了什么问题。

largest = None
smallest = None

try:
    num1 = input("Enter a number: ")
    num1 = int(num1)
    largest = num1
    smallest = num1

    while True:
        num = input("Enter a number: ")
        if num == "done" :
            break
        if num > largest:
            largest = num
        if num < smallest:
            smallest = num
        else: continue
except:
    print('Invalid input')



print("Maximum is ", largest)
print("Minimum is ", smallest)

Answer 1

如果检查退出条件为“ done”，并且输入不是“ done”，则将字符串转换为整数。然后所有if条件都将正确运行，并且while循环应该运行。

createCanvas()

Answer 2

这是一种简单的方法：

lst = []
while True:
    try: 
        lst.append(int(input("enter a number: ")))
    except:
        break

print(f"max is {max(lst)}")
print(f"min is {min(lst)}")

enter a number: 10
enter a number: 22
enter a number: 11
enter a number: 22
enter a number: 4
enter a number: done
max is 22
min is 4

Answer 3

除了其他更正：

largest = None
smallest = None

try:
    num1 = int(input("Enter a number: "))
    largest = num1
    smallest = num1

    while True:
        num = input("Enter a number: ")
        if str(num) == "done" :
            break
        if int(num) > largest:
            largest = num
        if int(num) < smallest:
            smallest = num
        else: continue
except:
    print('Invalid input')

print("Maximum is ", largest)
print("Minimum is ", smallest)

为什么while循环无法正常执行

3 个答案: