从我的计算器程序中得到奇怪的输出

Question

我有以下代码，它是一个计算器界面：

import pygame
import operator
pygame.init()
screen = pygame.display.set_mode((400, 711))
pygame.display.set_caption("INIX")
Calculator_Screen = pygame.image.load("Calculator.Screen.png")
op = {
    "+": operator.add,
    "-": operator.sub,
    "*": operator.mul,
    "/": operator.truediv,
}
def calculator_module():

    events = list(pygame.event.get())
    if not events:
        return 0
    for event in events:
        if event.type == pygame.QUIT:
            Calculator = False
            return Calculator
        elif event.type == pygame.MOUSEBUTTONUP:
            x, y = pygame.mouse.get_pos()
            if x > 17 and x < 107 and y > 445 and y < 530:     #1
                return "1"
            elif x > 108 and x < 198 and y > 445 and y < 530:     #2
                return "2"
            elif x > 199 and x < 290 and y > 445 and y < 530:     #3
                return "3"
            elif x > 17 and x < 107 and y > 336 and y < 443:     #4
                return "4"
            elif x > 108 and x < 198 and y > 336 and y < 443:     #5
                return "5"
            elif x > 199 and x < 290 and y > 336 and y < 443:     #6
                return "6"
            elif x > 17 and x < 107 and y > 268 and y < 334:     #7
                return "7"
            elif x > 108 and x < 198 and y > 268 and y < 334:     #8
                return "8"
            elif x > 199 and x < 290 and y > 268 and y < 334:     #9
                return "9"
            elif x > 17 and x < 107 and y > 532 and y < 620:     #0
                return "0"
            elif x > 199 and x < 290 and y > 532 and y < 620:     #=
                return "="
            elif x > 292 and x < 380 and y > 532 and y < 620:     #+
                return "+"
            elif x > 292 and x < 380 and y > 445 and y < 530:     #-
                return "-"
            elif x > 292 and x < 380 and y > 268 and y < 334:     #/
                return "/"
            elif x > 292 and x < 380 and y > 336 and y < 443:     #x
                return "*"
            else:
                return 0
    return 0

Calculator = True
while Calculator:
    screen.blit(Calculator_Screen, (0, 0))
    pygame.display.update()
    events = list(pygame.event.get())
    for event in events:
        if event.type == pygame.QUIT:
            Calculator = False
        if event.type == pygame.MOUSEBUTTONUP:
            x, y = pygame.mouse.get_pos()
            if x > 180 and x < 218 and y > 670 and y < 708:
                Calculator = False

            while True:
                current = 0
                num1 = 0
                num2 = 0

                while current not in op:
                    num1 = num1*10 + int(current)
                    current = calculator_module()
                last_op = current
                current = 0
                while current != "=":
                    if current in op:
                        num1 = op[last_op](num1, num2)
                        last_op = current
                        num2 = 0
                    else:
                        num1 = num1*10 + int(current)
                    current = calculator_module()
                res = op[last_op](num1, num2)
                print(res)

我在代码中遇到了一个问题，即当我执行 4-2 之类的简单操作时，我得到了类似 4000000000000000000000000000000000000... 的结果。我试图用下面的一些答案来解决它，但不能。如果您能提供帮助，将不胜感激。

Answer 1

你得到这么多的 0，因为你将每个 while 循环的 num1 与 10 相乘：

num1 = num1*10 + int(current)

即使您的代码还有更多问题，请从以下开始：

在初始化部分做：

current = -1

改变

    num1 = num1*10 + int(current)
    current =

到

    if current >= 0:
         num1 = num1*10 + int(current)
    current = -1

正如我所说，还有很多事情要做。所以请继续关注;)

---

您应该对 pygame.MOUSEBUTTONUP 进行操作，而不是对 pygame.MOUSEBUTTONDOWN，因为“down”具有自动重复功能。

您可以通过第一个即将发生的 DOWN 事件来保护目标区域，并忽略进一步的 DOWN 事件，直到 UP 事件到达。你可以检查DOWN-click-area和UP-click-area是否属于同一个按钮，然后才继续。