咖啡订单代码无法计算总价及统计销量问题求助

问题原因分析 #

• 变量类型不匹配：order()函数将用户输入转换为整数，但coff_order()中却用字符串（如'1'）进行比较，导致所有价格计算条件都不触发，后续total()函数调用未定义的价格变量报错。
• 全局变量未声明：修改全局销量统计变量（如tot_l_cap）时，未在coff_order()中声明global，导致Python将其视为局部变量，无法更新全局统计值。
• 订单计算逻辑错误：total()直接累加所有咖啡价格变量，但用户通常只点一种咖啡，未点的咖啡价格变量未定义，引发报错；同时字符串与数字直接拼接会触发类型错误。
• 字符串处理遗漏赋值：coff_summary()中coff_sum_ask.lower()未将结果存回原变量，导致输入大小写无法统一，判断逻辑失效。
• 函数未调用：定义了coff_order()但未执行，导致价格计算和销量统计完全没运行。
• 缺少总销售额统计：每日销售汇总未计算当日总销售额。

修复后的完整代码 #

from colorama import Fore, Back, Style

# 初始化每日销量统计
tot_l_cap = 0
tot_r_cap = 0
tot_l_esp = 0
tot_r_esp = 0
tot_l_lat = 0
tot_r_lat = 0
tot_l_iced_c_ic = 0
tot_r_iced_c_ic = 0
tot_l_iced = 0
tot_r_iced = 0

# 初始化当日总销售额
daily_total = 0.0

print(Fore.BLUE + 'Welcome to 4Shore Cafe!')
print('We are happy to be of your assistance today.')
print('Please select from our fabulous menu below: ')
print('        ')
print('        ')
print('Please be advised to enter all coffee choices with the integer they are associated with :)')
print('        ')
print('-------------------------------------------------------------------------------------------------') 
print('1. Cappuccino:       |Regular: $4.40         |Large: $4.95')
print('-------------------------------------------------------------------------------------------------')
print('2. Espresso:         |Regular: $3.60         |Large: $4.15')
print('-------------------------------------------------------------------------------------------------')                
print('3. Latte:            |Regular: $3.85         |Large: $4.40')
print('-------------------------------------------------------------------------------------------------')
print('4. Iced Coffee With ice-cream and cream:          |Regular: $4.40         |Large: $4.95')
print('5. Iced Coffee Without:                           |Regular: $3.85         |Large: $4.40' )
print('-------------------------------------------------------------------------------------------------')

def order():
    global coff_type, coff_size, quant_coff
    coff_type = int(input("What coffee would you like to order? "))
    coff_size = int(input('Enter 1 for regular, 2 for large: '))
    quant_coff = int(input('How many would you like to order? '))
    return coff_type, coff_size, quant_coff

order()

def coff_order():
    global tot_l_cap, tot_r_cap, tot_l_esp, tot_r_esp, tot_l_lat, tot_r_lat
    global tot_l_iced_c_ic, tot_r_iced_c_ic, tot_l_iced, tot_r_iced, daily_total
    order_total = 0.0
    
    if coff_type == 1:
        if coff_size == 2:
            order_total = 4.95 * quant_coff
            tot_l_cap += quant_coff
        elif coff_size == 1:
            order_total = 4.40 * quant_coff
            tot_r_cap += quant_coff  
    elif coff_type == 2:
        if coff_size == 2:
            order_total = 4.15 * quant_coff
            tot_l_esp += quant_coff
        elif coff_size == 1:
            order_total = 3.60 * quant_coff
            tot_r_esp += quant_coff   
    elif coff_type == 3:
        if coff_size == 2:
            order_total = 4.40 * quant_coff
            tot_l_lat += quant_coff
        elif coff_size == 1:
            order_total = 3.85 * quant_coff
            tot_r_lat += quant_coff  
    elif coff_type == 4:
        if coff_size == 2:
            order_total = 4.95 * quant_coff
            tot_l_iced_c_ic += quant_coff
        elif coff_size == 1:
            order_total = 4.40 * quant_coff
            tot_r_iced_c_ic += quant_coff 
    elif coff_type == 5:
        if coff_size == 2:
            order_total = 4.40 * quant_coff
            tot_l_iced += quant_coff
        elif coff_size == 1:
            order_total = 3.85 * quant_coff
            tot_r_iced += quant_coff   
    
    # 更新当日总销售额
    daily_total += order_total
    return order_total

# 执行订单计算
current_order_total = coff_order()

def total(order_total):
    subtotal = order_total
    gst = subtotal / 11  # GST按1/11计算
    print('Your Order: ')
    print(f"The total cost of your order is ${subtotal:.2f}")
    print(f'GST included in total: ${gst:.2f}')
    
total(current_order_total)    

def coff_summary():
    coff_sum_ask = input('Would you like a summary of todays sales? ' ).lower()
    if coff_sum_ask == 'yes':
        print('TODAYS SALES:')
        print(f'Total Large Cappuccino Sales: {tot_l_cap}')
        print(f'Total Regular Cappuccino Sales: {tot_r_cap}')
        print(f'Total Large Espresso Sales: {tot_l_esp}')
        print(f'Total Regular Espresso Sales: {tot_r_esp}')
        print(f'Total Large Latte Sales: {tot_l_lat}')
        print(f'Total Regular Latte Sales: {tot_r_lat}')
        print(f"Total Large Iced Coffee's with Cream and Icecream Sales: {tot_l_iced_c_ic}")
        print(f"Total Regular Iced Coffee's with Cream and Icecream Sales: {tot_r_iced_c_ic}")
        print(f"Total Large Iced Coffee's Sales: {tot_l_iced}")
        print(f"Total Regular Iced Coffee's Sales: {tot_r_iced}")
        print(f"Total Daily Sales: ${daily_total:.2f}")
    elif coff_sum_ask == 'no':
        print('Okay! Have a Good Day!!')

coff_summary()

关键修复点说明 #

1. 类型匹配修正：将coff_order()中的比较值从字符串改为整数，与order()的输入类型保持一致。
2. 全局变量声明：在coff_order()中声明所有需要修改的全局统计变量，确保能正确更新全局值。
3. 订单计算优化：用单个order_total变量存储当前订单金额，避免未定义变量问题；使用f-string格式化输出，解决字符串拼接类型错误。
4. 字符串处理修复：将coff_sum_ask.lower()的结果赋值回原变量，实现大小写不敏感判断。
5. 补充函数调用：添加coff_order()的调用，确保价格计算和销量统计执行。
6. 新增总销售额统计：初始化daily_total变量，每次订单后累加金额，在销售汇总中展示。

内容的提问来源于stack exchange，提问作者Charlee Candy