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python實(shí)現(xiàn)超市進(jìn)銷存管理系統(tǒng)

系統(tǒng)包括7種操作，分別是：1.查詢所有商品;2.添加商品;3.修改商品;4.刪除商品;5.賣出商品;6.匯總;0.退出系統(tǒng)。

定義一個(gè)商品類

#定義一個(gè)商品類 class Goods:     def __init__(self,name,num,cin,cout):         self.name = name         self.num = num         self.cin  = cin         self.cout = cout     def __str__(self):         state = "已售罄"         if self.num == 0:             return '名稱：%s , 數(shù)量：%d %s, 進(jìn)貨價(jià)格：%.2f ,售出價(jià)格：%.2f '%(self.name,self.num,state,self.cin,self.cout)         else:             return '名稱：%s , 數(shù)量：%d , 進(jìn)貨價(jià)格：%.2f ,售出價(jià)格：%.2f '%(self.name,self.num,self.cin,self.cout)  定義一個(gè)匯總類  #定義一個(gè)匯總類 class gGoods:     def __init__(self,name,gnum,gcin,gcout):         self.name = name         self.gnum = gnum         self.gcin = gcin         self.gcout = gcout     def __str__(self):         return '名稱：%s , 賣出數(shù)量：%d , 進(jìn)貨價(jià)格：%.2f ,賣出價(jià)格：%.2f '%(self.name,self.gnum,self.gcin,self.gcout)

定義管理商品類

#定義管理商品類 class GoodsManager:     go=[]     js=[]     #構(gòu)造方法     def init(self):         self.go.append(Goods('牛奶',5,40,60))         self.go.append(Goods('盒飯',5,10,60))         self.js.append(gGoods('菇娘',1,30,60))      #菜單     def Menu(self):         self.init()         print('\"超市進(jìn)銷存管理系統(tǒng)\"菜單：')         print("1.顯示所有商品")         print("2.添加新的商品")         print("3.修改商品信息")         print("4.刪除商品")         print("5.賣出商品")         print("6.匯總")         print("0.退出")         print("***********************************")         while True:                          SN=int(input("===請輸入操作序號："))                         if SN in [0,1,2,3,4,5,6]:                 if SN == 0:                     print("已經(jīng)退出")                     break;                 if SN == 1:                     self.Show_all()                 elif SN  == 2:                     self.Add()                 elif SN == 3:                     self.Modify()                 elif SN == 4:                     self.Delete()                 elif SN == 5:                     self.Shop()                 elif SN == 6:                     self.Summary()              else:                 print("輸入有誤！")     #顯示     def Show_all(self):         for goods in self.go:             print (str(goods))     #添加     def Add(self):         goods_name = input("請輸入商品名稱：")         ret = self.check(goods_name)         if ret != None:             print('商品已經(jīng)存在')             print('是否增加商品數(shù)量：（y/n）')             while True:                 pd = input()                 if pd == 'y':                     goods_num = int(input("請輸入商品的數(shù)量："))                     old_goods = Goods(goods_name,goods_num+ret.num,ret.cin,ret.cout)                     self.go.remove(ret)                     self.go.append(old_goods)                     print("增加成功")                     break                 elif pd == 'n':                     print("已經(jīng)返回")                     break                 else:                     print("輸入有誤，重新輸入：")                      else:             goods_num = int(input("請輸入商品的數(shù)量："))             goods_cin = float(input("請輸入商品進(jìn)貨價(jià)格："))             goods_cout = float(input("請輸入商品出貨價(jià)格："))             if goods_num>0 and goods_cin>0 and goods_cout>0:                 new_goods= Goods(goods_name,goods_num,goods_cin,goods_cout)                 self.go.append(new_goods)                 print("添加成功")             else:                 print("小可愛，輸入錯(cuò)誤！")     #修改     def Modify(self):         goods_name = input("請輸入需要修改的商品名稱：")         ret = self.check(goods_name)         if ret != None:             print(ret)             goods_name1 = input("請輸入修改后商品的名稱：")             goods_num = int(input("請輸入修改后商品的數(shù)量："))             goods_cin = float(input("請輸入修改后商品進(jìn)貨價(jià)格："))             goods_cout = float(input("請輸入修改后商品出貨價(jià)格："))             old_goods= Goods(goods_name1,goods_num,goods_cin,goods_cout)             self.go.remove(ret)             self.go.append(old_goods)                 print("修改成功")         else:             print("小可愛，沒有此商品!")     #檢查     def check(self,goods_name):         for goods in self.go:             if goods.name == goods_name:                 return goods         else:             return None     #檢查js     def checkjs(self,goods_name):         for goods in self.js:             if goods.name ==goods_name:                 return goods         else:             return None     #刪除     def Delete(self):         goods_name = input("請輸入需要?jiǎng)h除的商品名稱：")         ret = self.check(goods_name)         if ret != None:             print(ret)             print('是否刪除商品：（y/n）')             while True:                 pd = input()                 if pd == 'y':                     self.go.remove(ret)                     print("刪除成功")                     break                 elif pd == 'n':                     print("已經(jīng)返回")                     break                 else:                     print("輸入有誤，重新輸入：")         else:             print("小可愛，沒有此商品！")     #賣出     def Shop(self):         goods_name = input("請輸入需要賣出的商品名稱：")         ret = self.check(goods_name)         if ret != None:             g_num=int(input("賣出個(gè)數(shù):"))             if ret.num-g_num<0:                 print("該商品數(shù)量不足！請補(bǔ)充")             else:                 old_goods= Goods(ret.name,ret.num-g_num,ret.cin,ret.cout)                 self.go.remove(ret)                 self.go.append(old_goods)                 gret = self.checkjs(goods_name)                 if gret == None:                     shop_goods = gGoods(ret.name,g_num,ret.cin*g_num,ret.cout*g_num)                     self.js.append(shop_goods)                 else:                     shop_goods = gGoods(gret.name,g_num+gret.gnum,gret.gcin+ret.cin*g_num,gret.gcout+ret.cout*g_num)                     self.js.remove(gret)                     self.js.append(shop_goods)                 print("賣出后：",end=' ')                 old_goods= Goods(ret.name,ret.num-g_num,ret.cin*g_num,ret.cout*g_num)                 print(old_goods)                          else:             print("小可愛，沒有此商品！")     #匯總當(dāng)天賣出商品，包括每種銷售商品名稱、數(shù)量、進(jìn)貨總價(jià)、銷售總價(jià)等。     def Summary(self):         for goods in self.js:             print (str(goods))         print("售出的物品進(jìn)貨總價(jià)：",end="")         x=0         for goods in self.js:             x+=float(goods.gcin)         print(x)         print("售出的物品銷售總價(jià)：",end="")         y=0         for goods in self.js:             y+=float(goods.gcout)         print(y)         print("利潤：",y-x);```

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