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问题[функции]

Martin Hope
Neisven
Asked: 2024-02-11 03:13:47 +0800 CST
  • 5
-- Анонимная функция
local add = function(a, b)
    return a + b
end

-- Передача функции в качестве аргумента
local function apply(func, x)
    return func(x)
end

print(apply(add, 3))

你能帮我解决它吗？

lua: main.lua:3: attempt to perform arithmetic on a nil value (local 'b')
stack traceback:
        main.lua:3: in function <main.lua:2>
        (...tail calls...)
        main.lua:11: in main chunk
        [C]: in ?
функции
Martin Hope
iskander
Asked: 2024-02-09 02:06:35 +0800 CST
  • 3

通过变量计算函数的值：

Pestiferous (n)
       r = 0;
       for i = 1 to n do
           for j = 1 to i do
               for k = j to i + j do
                   for l = 1 to i + j - k do
                           r = r + 1;
       return (r)

我尝试计算总和，得到r = n(n + 1)(n + 2)(n + 3) / 24，但答案没有通过计算机检查。

функции
Martin Hope
Brain Drill
Asked: 2023-05-18 08:06:52 +0800 CST
  • 7

我正在为一个 API 方法编写一个测试，该方法可以采用多种数据类型，但显然不是全部。我想找到一种方法，本着String or Int.

我知道可能的解决方案，但我不喜欢它们：

  1. 使用类型Any是不安全的，而且不知何故一点也不好。
  2. 不可能重新声明一个已经指定了不同类型参数的函数，一些方法接受许多相似的参数。我知道这必须针对不同类型的每种组合来完成吗？

最小可重现代码的示例：

fun main() {
    
    fun myRequestMethod(
        firstParam: Any, //actualy can be ONLY String or Int
        secondParam: Any, //actualy can be ONLY String or Int
        thirdParam: Any //actualy can be ONLY String or Int
    ) {
        //do api-request
        println("$firstParam, $secondParam, $thirdParam")
    }
    
    myRequestMethod(1, 2, 3) //acceptible with Any type
    myRequestMethod("1", 2, "3") //acceptible with Any type
    myRequestMethod(mapOf("1" to 1), listOf(2, 2, 2), "3") //NOT acceptible with Any type
    myRequestMethod(1, listOf(1, 2, 3), mapOf("1" to 1)) //NOT acceptible with Any type
}

有没有我找不到的解决方案？谢谢你！

функции
Martin Hope
Миша Патюпин
Asked: 2022-10-01 17:56:01 +0800 CST
  • 0

Header.h 文件：

#pragma once
#include <stdlib.h>  
#include <stdio.h>

float masRR(); //Заполнение массива mas (как автоматически, так вручную), n - кол-во эл в массиве



float masRR () {
   float mas[100];
   int n;

   printf("Vvedite kol-vo elemtntov ");
   if (scanf_s("%d", &n) != 1) {
       printf("Error"); return 0;
   }


   int fl;
   printf("Ecli vi hotite vveti massiv vrythnyu - vvedite 0, esli hotite avto vvod - 1\n ");
   scanf_s("%d", &fl);
   if (fl == 0) {
       for (int i = 0; i < n; i++) {
           printf("%d element = ", i + 1);
           scanf_s("%f", &mas[i]);
       }
   }
   else {
       for (int i = 0, flZnak = 0; i < n; i++) {
           float znah_i = 0;
           znah_i = rand() % 200;
           flZnak = rand() % 2;
           if (flZnak == 0)
               mas[i] = znah_i;
           else
               mas[i] = 0 - znah_i;
       }
   }
   int nn = &n;
   return nn;   //Хочу использовать в main n, mas
}

实验室文件 3.1

#include "Header.h"


int main() {
    
    float masRR (); 
    int n = *nn;   //Без понятия как... Нужно чтобы из функции жил как и массив, так и n (кол-во эл массива)
//Дальше идет само задание, если тело функции float masRR () описывать вместо строчек выше - работает корректно 

    for (int i = 0; i < n; i++) {
        printf("%d elemetn = %2.f\n", i+1, mas[i]);
    }

    int min = mas[0];
    for (int i = 0; i < n; i++) {
        if (min > mas[i])
            min = mas[i];
    }
    printf("\nMin element = %d\n", min);

    int firstElPol;
    for (int i = 0; i < n; i++) {
        if (mas[i] > 0) { firstElPol = i; break; }
    }

    int lastElPol;
    for (int i = n; i > 0; i--) {
        if (mas[i] > 0) { lastElPol = i; break; }
    }

    int sum = 0;
    if (n > 2) {
        for (int i = firstElPol + 1; i <= lastElPol - 1; i++) {
            sum += mas[i];
        }
        printf("Sum megdy ferst and last pologitelnimi elementsmi = %d\n", sum);
    }

return 0;
}
c функции
Martin Hope
Uran54321
Asked: 2022-10-01 02:46:26 +0800 CST
  • 1

大家好！我没有调用该函数attack_zone()。我的错误是什么？

from tkinter import *
from tkinter import messagebox
from threading import Thread
from playsound import playsound 

kill_boss=False
robot_health = 100

def attack():
    global robot_health,kill_boss
    if robot_health==0:
        kill_boss=True
    else:
        robot_health-=1
    
kill = False

fight = Tk()
fight['bg']='black'
fight.geometry("400x400")
fight.title('Битва')
w = 500
h=500
Canvas = Canvas(bg='black')
Canvas.pack()

def kot(a):
    messagebox.showinfo('Заголовок',a) 

global a1
global a2
global b1
global b2
global c1
global c2
global d1
global d2

a1= 15
a2=15
d1=25
d2=25
c1=a1
c2=d2
b1=d1
b2=d1

player = Canvas.create_rectangle(a1,a2,d1,d2,fill='red')

Button(fight,bg='red',comand=attack()).pack()

def down():
    global a1
    global a2
    global b1
    global b2
    global c1
    global c2
    global d1
    global d2
    Canvas.move(player,0,10)
    d2=+1
    c2=+1

def up():
    global a1
    global a2
    global b1
    global b2
    global c1
    global c2
    global d1
    global d2
    Canvas.move(player,0,-10)
    d2=-10
    c2-=10

def left():
    global a1
    global a2
    global b1
    global b2
    global c1
    global c2
    global d1
    global d2
    Canvas.move(player,-10,0)
    c1=-10
    d1-=10

def right():
    global a1
    global a2
    global b1
    global b2
    global c1
    global c2
    global d1
    global d2
    Canvas.move(player,10,0)
    c1=+10
    d1=+10

global x1
global x2
global y1
global y2

x1=0
x2=10
y1=1000
y2=100

def luch():
    Canvas.create_rectangle(x1,x2,y1,y2,fill='white')

luch()

photo = PhotoImage(file = "1 враг.gif")
label = Label(image = photo).pack()
fight.mainloop()

w.bind("<Up>", lambda event:up)
w.bind("<Left>", lambda event:left)
w.bind("<Right>", lambda event:right)
w.bind("<Down>", lambda event:down)

def attack_zone():
    kot('kjhkjkl')
    global a1
    global a2
    global b1
    global b2
    global c1
    global c2
    global d1
    global d2
    global x1
    global x2
    global y1
    global y2
    kot('kjhkjkl')
    gorizontal = False
    vertical = False
    if a2<x2 and d2>y2:
        gorizontal = True
    if a1<x1 and d1>y1:
        vertical = True
    if gorizontal and vertical:
        kot("game_over")
    
attack_zone()

#请勿抄袭代码

python функции