第二次作业

一，登录注册页面及后端功能实现

# 导入tkinter库
from tkinter import *

# 设置登录窗口
win = Tk()
win.title('登陆')
win.geometry('300x150')
win.resizable(0, 0)
# 设置账号
Label(text='账号:').place(x=50, y=30)
uname = Entry(win)
uname.place(x=100, y=30)
# 设置密码
Label(text='密码:').place(x=50, y=70)
pwd = Entry(win)
pwd.place(x=100, y=70)
# 登陆
def login():
username = uname.get()
password = pwd.get()
if username == 'abc' and password == '123':
print('登陆成功')
else:
print('账号或者密码错误')
# 登陆按钮
Button(text='登陆', command=login).place(x=100, y=110)

win.mainloop()

import tkinter as tk
from tkinter import messagebox

def register():
username = entry_username.get()
password = entry_password.get()
confirm_password = entry_confirm_password.get()

# 简单的验证
if not username or not password or not confirm_password:
messagebox.showerror("错误", "所有字段都必须填写")
return
elif password != confirm_password:
messagebox.showerror("错误", "密码和确认密码不匹配")
return

# 在这里可以添加更多的验证逻辑，例如检查用户名是否已经存在等

# 注册成功的消息框
messagebox.showinfo("成功", "注册成功！")

# 创建主窗口
root = tk.Tk()
root.title("注册界面")

# 用户名标签和输入框
label_username = tk.Label(root, text="用户名:")
label_username.pack(pady=5)
entry_username = tk.Entry(root)
entry_username.pack(pady=5)

# 密码标签和输入框
label_password = tk.Label(root, text="密码:")
label_password.pack(pady=5)
entry_password = tk.Entry(root, show="*")
entry_password.pack(pady=5)

# 确认密码标签和输入框
label_confirm_password = tk.Label(root, text="确认密码:")
label_confirm_password.pack(pady=5)
entry_confirm_password = tk.Entry(root, show="*")
entry_confirm_password.pack(pady=5)

# 注册按钮
btn_register = tk.Button(root, text="注册", command=register)
btn_register.pack(pady=10)

# 启动主循环
root.mainloop()

接入数据库

import tkinter as tk
from tkinter import messagebox
import sqlite3

def create_table():
conn = sqlite3.connect('user_database.db')
cursor = conn.cursor()
cursor.execute('''
CREATE TABLE IF NOT EXISTS users (
id INTEGER PRIMARY KEY AUTOINCREMENT,
username TEXT NOT NULL,
password TEXT NOT NULL
)
''')
conn.commit()
conn.close()

def register():
create_table()

username = entry_username.get()
password = entry_password.get()
confirm_password = entry_confirm_password.get()

# 连接数据库并插入用户信息
conn = sqlite3.connect('user_database.db')
cursor = conn.cursor()

# 检查用户名是否已经存在
cursor.execute('SELECT * FROM users WHERE username = ?', (username,))
if cursor.fetchone():
messagebox.showerror("错误", "用户名已经存在")
conn.close()
return

# 插入用户信息
cursor.execute('INSERT INTO users (username, password) VALUES (?, ?)', (username, password))
conn.commit()
conn.close()

# 注册成功的消息框
messagebox.showinfo("成功", "注册成功！")

# 创建主窗口
root = tk.Tk()
root.title("注册界面")

# 用户名标签和输入框
label_username = tk.Label(root, text="用户名:")
label_username.pack(pady=5)
entry_username = tk.Entry(root)
entry_username.pack(pady=5)

# 密码标签和输入框
label_password = tk.Label(root, text="密码:")
label_password.pack(pady=5)
entry_password = tk.Entry(root, show="*")
entry_password.pack(pady=5)

# 注册按钮
btn_register = tk.Button(root, text="注册", command=register)
btn_register.pack(pady=10)

# 启动主循环
root.mainloop()

、

二，计算器页面设计

<!DOCTYPE html>

<head>

<style>

* {

margin: 0;

padding: 0;

}

.button {

width: 50px;

height: 50px;

font-size: 25px;

margin: 2px;

cursor: pointer;

background: #607d8b;

border: none;

color: white;

}

.button1 {

width: 221px;

height: 50px;

font-size: 25px;

margin: 2px;

cursor: pointer;

background: #607d8b;

border: none;

color: white;

}

.textView {

width: 200px;

margin: 5px;

font-size: 23px;

padding: 5px;

border: thick double #32a1ce;;

}

.main {

position: absolute;

top: 50%;

left: 50%;

transform: translateX(-50%) translateY(-50%);

}

html {

background: linear-gradient(to right, #00f7ff, #d0cd77);

height: 100%;

}

</style>

let a="1343.43245";

let b=a.indexOf(".");

console.log(b);

let c=a.substring(0,b+3);

console.log(c);

function insert(num) {

// TODO 插入

document.form.textView.value = document.form.textView.value + num;

}

function equal() {

// TODO 计算结果，并且结果保留两位小数

let exp = document.form.textView.value;

if (exp) {

let eval1 = eval(document.form.textView.value);

// eval() 执行括号内的语句 , 记录结果

let number = eval1.toString().indexOf(".");

if (number!==-1){

// 如果是小数，保留两位小数

eval1=eval1.toString().substring(0,number+3);

// 截取

document.form.textView.value=eval1;

}else {

// 如果不是小数，直接赋值

document.form.textView.value=eval1;

}

function Mclean() {

// TODO 清理输入框的文字

document.form.textView.value = null;

}

function back() {

// TODO 删除文本框的一个字符

let exp = document.form.textView.value;

document.form.textView.value = exp.substring(0, exp.length - 1);

// 截取字符串

}

function sqrt() {

let num = parseFloat(document.form.textView.value);

if (num < 0) {

document.form.textView.value='false';

return;

}

var guess = num / 2; // 初始猜测值为 num / 2

var epsilon = 0.00001; // 定义精度值

var previousGuess; // 用于存储上一次的猜测值

do {

previousGuess = guess; // 保存当前猜测值以便下一次迭代使用

guess = (guess + num / guess) / 2; // 牛顿迭代法更新猜测值

} while (Math.abs(guess - previousGuess) > epsilon); // 当两次猜测值之差小于精度值时停止迭代

document.form.textView.value=guess;

}

</script>

</head>

<body>

</form>

<table>

<tr>

</tr>

<tr>

</tr>

<tr>

</tr>

<tr>

</tr>

<tr>

</tr>

</table>

<tr>

</tr>

</div>

</body>

</html>

posted @ 2023-12-04 20:35 imoi 阅读(47) 评论(0) 收藏举报

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第二次作业

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