写一个带登陆系统的对对碰游戏

好的，这里给出一个简单的带登陆系统的对对碰游戏的示例代码，使用的是Python Flask框架和SQLite数据库：

from flask import Flask, render_template, request, redirect, url_for, session
import sqlite3
import random

app = Flask(__name__)
app.secret_key = 'secret_key'

# 连接数据库
conn = sqlite3.connect('users.db')
c = conn.cursor()

# 创建用户表
c.execute('''CREATE TABLE IF NOT EXISTS users
             (username TEXT PRIMARY KEY, password TEXT)''')

# 创建游戏记录表
c.execute('''CREATE TABLE IF NOT EXISTS records
             (username TEXT, score INTEGER)''')
conn.commit()

# 关闭数据库连接
conn.close()

# 登陆页面
@app.route('/', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        username = request.form['username']
        password = request.form['password']
        # 连接数据库
        conn = sqlite3.connect('users.db')
        c = conn.cursor()
        # 查找用户
        c.execute("SELECT * FROM users WHERE username=? AND password=?", (username, password))
        user = c.fetchone()
        # 关闭数据库连接
        conn.close()
        if user:
            session['username'] = username
            return redirect(url_for('game'))
        else:
            return render_template('login.html', error='用户名或密码错误')
    else:
        return render_template('login.html')

# 注册页面
@app.route('/register', methods=['GET', 'POST'])
def register():
    if request.method == 'POST':
        username = request.form['username']
        password = request.form['password']
        # 连接数据库
        conn = sqlite3.connect('users.db')
        c = conn.cursor()
        # 查找用户
        c.execute("SELECT * FROM users WHERE username=?", (username,))
        user = c.fetchone()
        if user:
            # 用户名已存在
            return render_template('register.html', error='用户名已存在')
        else:
            # 创建新用户
            c.execute("INSERT INTO users VALUES (?, ?)", (username, password))
            conn.commit()
            # 关闭数据库连接
            conn.close()
            session['username'] = username
            return redirect(url_for('game'))
    else:
        return render_template('register.html')

# 游戏页面
@app.route('/game')
def game():
    if 'username' in session:
        # 随机生成两个数字
        num1 = random.randint(1, 10)
        num2 = random.randint(1, 10)
        # 计算正确答案
        answer = num1 + num2
        # 保存正确答案到session
        session['answer'] = answer
        return render_template('game.html', num1=num1, num2=num2)
    else:
        return redirect(url_for('login'))

# 提交答案
@app.route('/submit', methods=['POST'])
def submit():
    if 'username' in session:
        answer = session['answer']
        user_answer = int(request.form['answer'])
        if user_answer == answer:
            # 答案正确，增加得分
            conn = sqlite3.connect('users.db')
            c = conn.cursor()
            c.execute("INSERT INTO records VALUES (?, ?)", (session['username'], 1))
            conn.commit()
            conn.close()
            return redirect(url_for('game'))
        else:
            # 答案错误，游戏结束
            conn = sqlite3.connect('users.db')
            c = conn.cursor()
            c.execute("INSERT INTO records VALUES (?, ?)", (session['username'], 0))
            conn.commit()
            conn.close()
            return render_template('gameover.html')
    else:
        return redirect(url_for('login'))

# 分数排行榜页面
@app.route('/leaderboard')
def leaderboard():
    # 连接数据库
    conn = sqlite3.connect('users.db')
    c = conn.cursor()
    # 查询每个用户的得分总和
    c.execute("SELECT username, SUM(score) FROM records GROUP BY username ORDER BY SUM(score) DESC")
    leaderboard = c.fetchall()
    # 关闭数据库连接
    conn.close()
    return render_template('leaderboard.html', leaderboard=leaderboard)

if __name__ == '__main__':
    app.run(debug=True)

这个游戏的玩法很简单，每次会随机生成两个数字，然后用户需要输入这两个数字的和，如果答案正确，则得分加一，否则游戏结束。游戏结束后会记录用户的得分，并且会显示分数排行榜，按照得分从高到低排名。

注意，这只是一个简单的示例代码，实际的游戏可能需要更复杂的逻辑和更完善的安全性措施。