Question

如何在启动后立即关闭程序？

我希望用户使用列出的功能，并允许用户关闭窗口或在完成后终止进程。

import math

print("use start() to input equation and x() to input x's")

def start():
    #ask for intial variables

    global t
    global a
    global b
    global c
    global d
    global e
    global f
    global g


    t = int(input("highest degree coefficient: "))
    a = int(input("a: "))
    b = int(input("b: "))
    c = int(input("c: "))
    d = int(input("d: "))
    e = int(input("e: "))
    f = int(input("f: "))
    g = int(input("g: "))

def x():
    again = "yes"

    #runs if it is a quadratic

    if t == 2:

        #asks for x input

        x = float(input("x: "))

        #calculates

        ans = ((a) * x ** 2) + (b * x) + c

        #prints result

        print("f(x):",ans)

        #asks if there is more

        again = input("again?: ")
        again = again.lower()

        while again != "no":

            x = float(input("x: "))

            ans = ((a) * x ** 2) + (b * x) + c

            print("f(x):",ans)

            again = input("again?: ")
            again = again.lower()

    #runs if it is a cubic

    elif t == 3:
        #asks for x input

        x = float(input("x: "))

        #calculates

        ans = ((a) * x ** 3) + ((b) * x ** 2) + (c * x) + d

        #prints result

        print("f(x):",ans)

        #asks if there is more

        again = input("again?: ")
        again = again.lower()

        while again != "no":

            x = float(input("x: "))

            ans = ((a) * x ** 3) + ((b) * x ** 2) + (c * x) + d

            print("f(x):",ans)

            again = input("again?: ")
            again = again.lower()
    elif t == 4:
        #asks for x input

        x = float(input("x: "))

        #calculates

        ans = ((a) * x ** 4) + ((b) * x ** 3) + ((c) * x ** 2) + (d * x) + e

        #prints result

        print("f(x):",ans)

        #asks if there is more

        again = input("again?: ")
        again = again.lower()

        while again != "no":

            x = float(input("x: "))

            ans = ((a) * x ** 4) + ((b) * x ** 3) + ((c) * x ** 2) + (d * x) + e

            print("f(x):",ans)

            again = input("again?: ")
            again = again.lower()
    elif t == 5:
        #asks for x input

        x = float(input("x: "))

        #calculates

        ans = ((a) * x ** 5) + ((b) * x ** 4) + ((c) * x ** 3) + ((d) * x ** 2) + (e * x) + f

        #prints result

        print("f(x):",ans)

        #asks if there is more

        again = input("again?: ")
        again = again.lower()

        while again != "no":

            x = float(input("x: "))

            ans = ((a) * x ** 5) + ((b) * x ** 4) + ((c) * x ** 3) + ((d) * x ** 2) + (e * x) + f

            print("f(x):",ans)

            again = input("again?: ")
            again = again.lower()
    elif t == 6:
        #asks for x input

        x = float(input("x: "))

        #calculates

        ans = ((a) * x ** 6) + ((b) * x ** 5) + ((c) * x ** 4) + ((d) * x ** 3) + ((e) * x ** 2) + (f * x) + g

        #prints result

        print("f(x):",ans)

        #asks if there is more

        again = input("again?: ")
        again = again.lower()

        while again != "no":

            x = float(input("x: "))

            ans = ((a) * x ** 6) + ((b) * x ** 5) + ((c) * x ** 4) + ((d) * x ** 3) + ((e) * x ** 2) + (f * x) + g

            print("f(x):",ans)

            again = input("again?: ")
            again = again.lower()
    else:
        print("coming soon")

Answer 1

您可以使用以下for循环在start函数中分配变量：

def start():
    #ask for intial variables

    global t
    global a
    global b
    global c
    global d
    global e
    global f
    global g


    for letter in "tabcdefg":
        if letter == "t":
            var = input("highest degree coefficient: ")
        else:
            var = input(letter + ": ")

        if var == "quit":
            quit()

        else:
            globals()[letter] = int(var)

对于每个变量，如果用户键入quit，程序将退出。

在原始代码中，未调用start和x函数，因此您需要在代码的底部放置以下内容以确保其执行：

while True:
    start()
    x()

Answer 2

您的主程序包含导入和打印声明。然后它定义了两个函数 - 但从不调用它们 - 并退出。

您需要从主程序中调用一些有用的东西，例如函数 x 。更好的是，将用户查询逻辑从 x 移动到主程序。让用户键入＆＃34; start（）＆＃34;不会做任何有用的事情：它以字符串形式出现，而不是Python命令。

您的代码中没有任何内容调用任何函数。你需要一个外部（主程序）结构，如下所示：

again = "yes"
while again != "no":
    start()
    x()
    again = input("again?: ")
    again = again.lower()

我强烈建议您单独从外壳开始：确保您可以重复。接下来，仅添加二次情形;确保在添加高阶数之前有效。

保持程序的功能列表立即关闭

2 个答案: