本文實(shí)例為大家分享了python3實(shí)現(xiàn)點(diǎn)餐系統(tǒng)的具體代碼，供大家參考，具體內(nèi)容如下

題目：

    某餐廳外賣每天更新菜品，但是搭配價(jià)格是不變的，具體如下：

    "今天菜單如下","1  宮保雞丁","2  青椒雞米粒" ,"3  白蘿卜燜肉", "4  蒜薹臘肉", "5  豆腐包肉 ",

     "6  鯉魚躍龍門", "7  涼拌蓮藕", "8  紅燒南瓜", "9  大白菜", "10 青菜", "11 荷包蛋(另加２元）", "12 蛋炒飯(10元)"
    一葷一素10，兩素菜9元，一葷兩素11，，三素菜10，兩葷菜12，兩葷一素13，兩葷兩素14，兩葷三素15元

    現(xiàn)在需要求取用戶輸入選擇菜品的編號，求取需要支付的價(jià)格

代碼：

#coding UTF-8# version = version_1_2 today_menu = ["今天菜單如下","1 宮保雞丁","2 青椒雞米粒" ,"3 白蘿卜燜肉", "4 蒜薹臘肉", "5 豆腐包肉 ", "6 鯉魚躍龍門", "7 涼拌蓮藕", "8 紅燒南瓜", "9 大白菜", "10 青菜", "11 荷包蛋(另加２元）", "12 蛋炒飯(10元)"]price =[0,0,12,0,0 ,10 ,13,0,9,11,14,0,10,0,15,0] def getTodayMenu(): return today_menudef showTodayMenu(interable): for today_menu_details in today_menu :  print(today_menu_details) def showCombineNote(): print("提示：一葷一素10，兩素菜9元，一葷兩素11，，三素菜10，兩葷菜12，兩葷一素13，兩葷兩素14，兩葷三素15元") print("請輸入您點(diǎn)餐的編號，編號之間用逗號分開，不同份數(shù)之間用空格隔開/n例如輸入1,9,10 2,6,8 3,10,謝謝 : ") def dealWithUserInput(): user_choise = input()   user_choise_list = user_choise.split()  price_total = 0#用price_total來記錄所點(diǎn)菜的總和 price_one = 0#用來計(jì)算每一份菜的價(jià)格 choosed_list = [] pay_total = 0 #用來保存優(yōu)惠后需要支付的價(jià)格  for one_order in user_choise_list :  count_i = count_j =0 #count_i用來保存素菜的個(gè)數(shù)　　count_j用來保存混菜的個(gè)數(shù)  hebaodan = 0#用來記錄荷包蛋的個(gè)數(shù)  danchaofan = 0#用來記錄蛋炒飯的個(gè)數(shù)  one_order_list = one_order.split(",")#one_order_list 保存的是["1","9","10]  for menu_item in one_order_list :#menu_item　就是保存的單個(gè)的數(shù)字   #首先得防止用戶輸入的不是數(shù)字，是數(shù)字則處理，不是則提示用戶重新輸入   if menu_item.strip().isdigit():     #這里防止用戶輸入的時(shí)候跟預(yù)期的不一樣，可能多了一些空格，所以需要去掉空格后轉(zhuǎn)化為數(shù)字    if int(menu_item.strip()) <7:      count_j += 1    elif int(menu_item.strip()) <11:     count_i += 1    elif int(menu_item.strip()) == 11:     hebaodan += 1    elif int(menu_item.strip()) == 12:     danchaofan += 1    choosed_list.append(int(menu_item))   else:    print("您輸入的有非數(shù)字類型，請重新運(yùn)行程序，謝謝")    exit()   choosed_list.append(0)    #如果是正確的組合，則price[count_i*4 + count_j]是不會(huì)為０的，但是輸入一個(gè)數(shù)字代表特色菜品的時(shí)候也是可行的  #兩種組合都不是的時(shí)候就證明不是正確的組合，程序退出  if price[count_i*4 + count_j] ==0 and "12" not in one_order:    print("您輸入的不是一個(gè)正確的組合，請重新運(yùn)行程序，　謝謝")   exit()  else:   price_one= price[count_i*4 + count_j] + hebaodan *2 + danchaofan * 10  price_total += price_one  #根據(jù)計(jì)算得到的總需要支付的價(jià)格，判斷享受哪種優(yōu)惠，得出優(yōu)惠后的價(jià)格 if price_total >=30:  pay_total = price_total - 4   elif price_total >=26:  pay_total = price_total - 3  elif price_total >=20:  pay_total = price_total - 2 else:  pay_total = price_total  print("您預(yù)訂了 %d 份美食，具體如下: " % len(user_choise_list))  for choosed_item in choosed_list :  if choosed_item == 0:   print()  else:   print(today_menu[choosed_item]) print("您共需要支付 %d 元,謝謝" % pay_total) print("歡迎進(jìn)入點(diǎn)餐系統(tǒng)") today_menu = getTodayMenu()showTodayMenu(today_menu)showCombineNote()dealWithUserInput()