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);```
