商品月销售基本信息管理软件设计.doc

/*商品月销售基本信息管理软件设计*#include#include#include#include 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 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 endl; cout _ endl; cout = _ = endl; cout endl; cout endl; cout-欢迎使用商品查询系统-;coutendlendl;int select;char s;while(1)select=Menu();switch(select)case 1:write();break; case 2:search();break;case 3:sell();break;case 4:in();break;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输入商品个数:n;for(i=0;in;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pro.number; ; cinpro.price; cinpro.address; cinpro.total_num; pro.total_sale=pro.total_num*pro.price; cinpro.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); coutn;/*查找是否有符合条件的商品*domfile.read(char*)&pro,sizeof(pro);while(pro.number!=n&!mfile.eof();if(!mfile.eof() cout商品名称：endl;cout商品库存余量：pro.stocksendl;cout商品价格：pro.priceendl;cout商品总销售额：pro.total_saleendl;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);coutn;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;cout商品库存余量：pro.stocksendl;cout商品价格：pro.priceendl; cout商品总销售额：pro.total_saleendl;elsecout无此商品endl;return; coutx;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商品名称：endl;cout商品库存余量：pro.stocksendl;cout商品价格：pro.priceendl; cout商品总销售额：pro.total_saleendl;mfile.close();void sell() /*售出功能*product pro;int n, x;fstream mfile(info.dat,ios:in|ios:out|ios:binary);coutn;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;cout商品库存余量：pro.stocksendl;cout商品价格：pro.priceendl;cout商品总销售额：pro.total_saleendl;elsecout无此商品endl; coutx;if(pro.stocksx)pro.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商品库存余量：pro.stocksendl; cout商品价格：pro.priceendl;cout商品总销售额：pro.total_saleendl;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:binary);domfile.read(char*)&pro,sizeof(pro);if(tpro.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;coutnumtnttendl;int Menu()cout主菜单endl;int n=1, select=-1;coutn+录入功能 ;coutn+查询功能 ;coutn+售出功能 ;cou