from datetime import datetime
 
def calculate_daily_words():
    # 当前掌握的单词量
    current_words = 2500
 
    # 目标单词量
    target_words = 4000
 
    # 获取当前日期和考试日期（假设考试日期为2024年6月15日）
    today = datetime.now()
    exam_date = datetime(2024, 6, 15)  # 考试日期
 
    # 计算剩余天数
    remaining_days = (exam_date - today).days
 
    # 检查剩余天数是否有效
    if remaining_days <= 0:
        print("考试日期已过或今天就是考试日！")
        return
 
    # 计算需要背诵的单词总量
    words_to_learn = target_words - current_words
 
    # 检查是否需要背诵单词
    if words_to_learn <= 0:
        print("恭喜！你已经达到或超过了目标单词量。")
        return
 
    # 计算每天需要背诵的单词量
    daily_words = words_to_learn / remaining_days
 
    print(f"从今天（{today.strftime('%Y-%m-%d')}）到考试日（{exam_date.strftime('%Y-%m-%d')}）还有 {remaining_days} 天。")
    print(f"你需要每天至少背诵 {daily_words:.2f} 个单词。")
 
# 运行程序
calculate_daily_words()

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