面向对象程序设计
python实现超市进销存管理系统
系统包括7种操作,分别是:1.查询所有商品;2.添加商品;3.修改商品;4.删除商品;5.卖出商品;6.汇总;0.退出系统。
定义一个商品类
- #定义一个商品类
- 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 '名称:%s , 数量:%d %s, 进货价格:%.2f ,售出价格:%.2f '%(self.name,self.num,state,self.cin,self.cout)
- else:
- return '名称:%s , 数量:%d , 进货价格:%.2f ,售出价格:%.2f '%(self.name,self.num,self.cin,self.cout)
- 定义一个汇总类
- #定义一个汇总类
- 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 '名称:%s , 卖出数量:%d , 进货价格:%.2f ,卖出价格:%.2f '%(self.name,self.gnum,self.gcin,self.gcout)
定义管理商品类
- #定义管理商品类
- class GoodsManager:
- go=[]
- js=[]
- #构造方法
- def init(self):
- self.go.append(Goods('牛奶',5,40,60))
- self.go.append(Goods('盒饭',5,10,60))
- self.js.append(gGoods('菇娘',1,30,60))
- #菜单
- def Menu(self):
- self.init()
- print('\"超市进销存管理系统\"菜单:')
- print("1.显示所有商品")
- print("2.添加新的商品")
- print("3.修改商品信息")
- print("4.删除商品")
- print("5.卖出商品")
- print("6.汇总")
- print("0.退出")
- print("***********************************")
- while True:
- SN=int(input("===请输入操作序号:"))
- if SN in [0,1,2,3,4,5,6]:
- if SN == 0:
- print("已经退出")
- 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("输入有误!")
- #显示
- def Show_all(self):
- for goods in self.go:
- print (str(goods))
- #添加
- def Add(self):
- goods_name = input("请输入商品名称:")
- ret = self.check(goods_name)
- if ret != None:
- print('商品已经存在')
- print('是否增加商品数量:(y/n)')
- while True:
- pd = input()
- if pd == 'y':
- goods_num = int(input("请输入商品的数量:"))
- 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("已经返回")
- break
- else:
- print("输入有误,重新输入:")
- else:
- goods_num = int(input("请输入商品的数量:"))
- goods_cin = float(input("请输入商品进货价格:"))
- goods_cout = float(input("请输入商品出货价格:"))
- 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("小可爱,输入错误!")
- #修改
- def Modify(self):
- goods_name = input("请输入需要修改的商品名称:")
- ret = self.check(goods_name)
- if ret != None:
- print(ret)
- goods_name1 = input("请输入修改后商品的名称:")
- goods_num = int(input("请输入修改后商品的数量:"))
- goods_cin = float(input("请输入修改后商品进货价格:"))
- goods_cout = float(input("请输入修改后商品出货价格:"))
- 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("小可爱,没有此商品!")
- #检查
- def check(self,goods_name):
- for goods in self.go:
- if goods.name == goods_name:
- return goods
- else:
- return None
- #检查js
- def checkjs(self,goods_name):
- for goods in self.js:
- if goods.name ==goods_name:
- return goods
- else:
- return None
- #删除
- def Delete(self):
- goods_name = input("请输入需要删除的商品名称:")
- ret = self.check(goods_name)
- if ret != None:
- print(ret)
- print('是否删除商品:(y/n)')
- while True:
- pd = input()
- if pd == 'y':
- self.go.remove(ret)
- print("删除成功")
- break
- elif pd == 'n':
- print("已经返回")
- break
- else:
- print("输入有误,重新输入:")
- else:
- print("小可爱,没有此商品!")
- #卖出
- def Shop(self):
- goods_name = input("请输入需要卖出的商品名称:")
- ret = self.check(goods_name)
- if ret != None:
- g_num=int(input("卖出个数:"))
- if ret.num-g_num<0:
- print("该商品数量不足!请补充")
- 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("卖出后:",end=' ')
- old_goods= Goods(ret.name,ret.num-g_num,ret.cin*g_num,ret.cout*g_num)
- print(old_goods)
- else:
- print("小可爱,没有此商品!")
- #汇总当天卖出商品,包括每种销售商品名称、数量、进货总价、销售总价等。
- def Summary(self):
- for goods in self.js:
- print (str(goods))
- print("售出的物品进货总价:",end="")
- x=0
- for goods in self.js:
- x+=float(goods.gcin)
- print(x)
- print("售出的物品销售总价:",end="")
- y=0
- for goods in self.js:
- y+=float(goods.gcout)
- print(y)
- print("利润:",y-x);```