商品月销售基本信息管理软件设计

1、/*商品月销售基本信息管理软件设计*#include<fstream.h>#include<iostream.h>#include<string.h>#include <conio.h>struct productint number;char name20;double price;char address20;int total_num; /*本月当前销售总数量*double total_sale; /*本月当前销售总金额* int stocks; /*库存余量*;void write(); /录入void search(); /查询void

2、 in(); /进货void sell(); /售出void stat(); /统计char Exit(); /退出int Menu(); /菜单int main() cout<<" ¤¤ "<<endl; cout<<" "<<endl; cout<<" < 欢迎来到商品查询系统 > "<<endl; cout<<" _ "<<endl; cout<<" = _ =

3、 "<<endl; cout<<" "<<endl; cout<<" "<<endl; cout<<"-欢迎使用商品查询系统-"cout<<endl<<endl;int select;char s;while(1)select=Menu();switch(select)case 1:1 / 6write();break; case 2:search();break;case 3:sell();break;case 4:in();b

4、reak;case 5:stat();break;case 6:s=Exit();if(s='Y'|s='y')return 0;break;default:cout<<"无效输入！"<<endl;return 0;void write()product pro;int i, n;ofstream outfile("info.dat",ios:out|ios:binary);if(!outfile)cout<<"文件打开错误！"return;cout<<&

5、quot;输入商品个数:"<<endl;cin>>n;for(i=0;i<n;i+) cout<<"输入第"<<i+1<<"个商品的编号、名称、单价、生产地、销售总数、库存余量"<<endl; cin>>pro.number; cin>>; cin>>pro.price; cin>>pro.address; cin>>pro.total_num; pro.total_sale=pro.tota

6、l_num*pro.price; cin>>pro.stocks; outfile.write(char*)&pro, sizeof(pro); /*向磁盘文件输出数据*outfile.close();void search() /*查找功能*product pro;int n;fstream mfile("info.dat",ios:in|ios:binary); cout<<"输入要查询商品的编号："cin>>n;/*查找是否有符合条件的商品*domfile.read(char*)&pro,size

7、of(pro);while(pro.number!=n&&!mfile.eof();if(!mfile.eof() cout<<"商品名称："<<<<endl;cout<<"商品库存余量："<<pro.stocks<<endl;cout<<"商品价格："<<pro.price<<endl;cout<<"商品总销售额："<<pro.total_sale&l

8、t;<endl;elsecout<<"无此商品"<<endl;mfile.close();void in() /*进货功能* product pro;int n, x;fstream mfile("info.dat",ios:in|ios:out|ios:binary);cout<<"输入要进货商品的编号："cin>>n;domfile.read(char*)&pro,sizeof(pro);while(pro.number!=n&&!mfile.eof()

9、;if(!mfile.eof()cout<<"当前商品信息："<<endl;cout<<"商品名称："<<<<endl;cout<<"商品库存余量："<<pro.stocks<<endl;cout<<"商品价格："<<pro.price<<endl; cout<<"商品总销售额："<<pro.total_sale<<

10、;endl;elsecout<<"无此商品"<<endl;return; cout<<"请输入进货数量："cin>>x;pro.stocks+=x; /*库存增加* pro.total_sale-=pro.price*x; /*销售总额减少* mfile.seekp(-(int)sizeof(pro),ios:cur);mfile.write(char*)&(pro),sizeof(pro); cout<<"新的商品信息："<<endl;cout<&

11、lt;"商品名称："<<<<endl;cout<<"商品库存余量："<<pro.stocks<<endl;cout<<"商品价格："<<pro.price<<endl; cout<<"商品总销售额："<<pro.total_sale<<endl;mfile.close();void sell() /*售出功能*product pro;int n, x;fstream m

12、file("info.dat",ios:in|ios:out|ios:binary);cout<<"输入售出商品的编号："cin>>n;domfile.read(char*)&pro,sizeof(pro);while(pro.number!=n&&!mfile.eof();if(!mfile.eof()cout<<"当前商品信息："<<endl;cout<<"商品名称："<<<<endl;c

13、out<<"商品库存余量："<<pro.stocks<<endl;cout<<"商品价格："<<pro.price<<endl;cout<<"商品总销售额："<<pro.total_sale<<endl;elsecout<<"无此商品"<<endl; cout<<"请输入售出数量："cin>>x;if(pro.stocks>x)pro.

14、stocks-=x; /*库存减少*elsecout<<"输入数据错误！"<<endl;pro.total_sale+=pro.price*x; /*销售总额增加*mfile.seekp(-(int)sizeof(pro),ios:cur);mfile.write(char*)&(pro),sizeof(pro); cout<<"新的商品信息："<<endl;cout<<"商品名称："<<<<endl;cout<<&

15、quot;商品库存余量："<<pro.stocks<<endl; cout<<"商品价格："<<pro.price<<endl;cout<<"商品总销售额："<<pro.total_sale<<endl;mfile.close();void stat() /*统计功能* product pro;double t=0.0;int num=0;char n20;fstream mfile("info.dat",ios:in|ios:b

16、inary);domfile.read(char*)&pro,sizeof(pro);if(t<pro.total_sale)t=pro.total_sale;num=pro.number;strcpy(n,);while(!mfile.eof();cout<<"最大商品的编号、商品名及销售总额："<<endl;cout<<num<<'t'<<n<<'t'<<t<<endl;int Menu()cout<<

17、"主菜单"<<endl;int n=1, select=-1;cout<<n+<<"录入功能"<<" "cout<<n+<<"查询功能"<<" "cout<<n+<<"售出功能"<<" "cout<<n+<<"进货功能"<<" "cout<<n+<<"统计功能"<<" "cout<<n+<<"退出"<<endl<<endl;cout<<"请选择相应数字："cin>>select;return select;char Exit()char s;cout<<"确