用c语言编写商品管理系统

1、#include<stdio .h>#include<stdlib .h>#include<conio .h>#include<dos .h>#include<string .h>#defineLEN sizeof (struct commdity)#defineFORMAT "%-8d%-15s%-12.11f%-12.11f%-12.11fn"#defineDATAcommi.num,,commi.price,commi.count,commi.total/* 定义商品的结构体 */stru

2、ct commdityint num;char name15;doublecount;doubletotal;comm100000,t;/* 函数的声明 */专业资料void in();/* 商品录入并保存 */void show();/* 显示商品记录 */void order();/* 商品记录排序 */void del();/* 商品记录删除 */void modify();/* 商品记录修改 */void menu();/* 主菜单 */void insert();/* 商品记录插入 */void total();/* 商品统计 */void search();/* 查看商品记录 */

3、void main()int n;menu();scanf( "%d",& n);while (n)switch (n)case 0:break ;专业资料case 1:in(); break ;case 2:search(); break ;case 3:del(); break ;case 4:modify();break ;case 5:insert(); break ;case 6:order(); break ;case 7:total(); break ;default :printf( "error!操作错误 .n" );break

4、 ;getch();menu();scanf( "%d",& n);/*自定义主菜单函数 */void menu()system( "cls");/* 清屏 */printf( "nnnnn");printf( "tt-欢迎将进入商品管理系统-n");专业资料printf( "tt|t0.退出 |n" );printf( "tt|t1.录入记录 |n");printf( "tt|t2.查找记录 |n");printf( "tt|t3.删除

5、记录 |n");printf( "tt|t4.修改记录 |n");printf( "tt|t5.插入记录 |n");printf( "tt|t6.排序记录 |n");printf( "tt|t7.统计记录 |n");printf( "tt|-|n");printf( "ttt请输入您的操作类型【 0-7 】: n" );/*自定义商品录入并保存函数*/void in() int i,m =0;char ch2;FILE*fp;if(fp =fopen( "

6、data.txt" ,"ab+" )= NULL) printf( "不能打开文件！ n" );专业资料return ; while (!feof(fp) if(fread( & commm,LEN,1,fp)= 1)m+ ;fclose(fp);if(m =0)printf( "无商品记录 .n" );else system( "cls"); show();if(fp =fopen( "data.txt","wb" ) = NULL) printf( &q

7、uot;不能打开文件！ n" );return ;for(i=0;i<m;i +)fwrite( &commi,LEN,1,fp);printf( "是否输入？ (y/n):n");scanf( "%s",ch);while (strcmp(ch,"Y")= 0|strcmp(ch,"y")= 0)专业资料 printf( "编号 :n" );scanf( "%d",& commm.num);for (i=0;i<m;i + )if(co

8、mmm.num = commi.num) printf( "该记录已经存在，按任意键返回 .n" ); getch();fclose(fp);return ;printf( "商品名 :n" );scanf( "%s",);printf( "单价 :n" );scanf( "%lf",& commm. price);printf( "数量 :n" );scanf( "%lf",& commm. num);commm.to

9、tal =commm.count *commm.price;if(fwrite( & commm,LEN,1,fp)!=1) printf( "不能保存！ n" ); getch();return ;专业资料elseprintf( "%s 已经保存 !n" ,);m+ ;printf( "是否继续？ (y/n):n");scanf( "%s",ch);fclose(fp);printf( "OK!n" );return ;/*自定义显示商品记录函数 */void sh

10、ow() int i,m =0; FILE*fp;if(fp =fopen( "data.txt" ,"ab+" )= NULL)printf( "不能打开记录！ n" );return ;while (!feof(fp)if(fread( & commm,LEN,1,fp)= 1)m+ ;专业资料fclose(fp);if(m = 0)printf( "无商品记录 .n" );elseprintf( "编号 商品名称单价 数量 总金额 tn");for (i=0;i<m;i +

11、)printf(FORMAT,DATA);/*自定义商品查看函数 */void search() FILE*fp;int snum,i,m =0;char ch2;if(fp =fopen( "data.txt" ,"ab+" )= NULL)printf( "不能打开文件！ n" );return ;while (!feof(fp)专业资料if(fread( & commm,LEN,1,fp)= 1)m+ ;fclose(fp);if(m = 0) printf( "无商品记录 .n" );return

12、;printf( "编号 :n" );scanf( "%d",& snum);for(i=0;i<m;i + )if(snum = commi.num)printf( "已经找到记录，是否显示？(y/n):n");scanf( "%s",ch);if(strcmp(ch,"Y")= 0|strcmp(ch,"y")= 0)printf( "编号 商品名称单价 数量 总金额tn");printf(FORMAT,DATA);break ;else

13、return ;专业资料if(i= m)printf( "没有找到相应的记录 .n" );/*自定义商品记录删除函数*/void del()int i,m =0,j,snum;char ch2;FILE*fp;if(fp =fopen( "data.txt","ab+" )= NULL)printf( "不能打开文件！ n" );return ;while (!feof(fp)if(fread( & commm,LEN,1,fp)=1)m+ ;fclose(fp);if(m = 0)printf( &quo

14、t;无商品记录 .n" );return ;专业资料printf( "请输入编号 :n" );scanf( "%d",& snum);for (i=0;i<m;i +)if(snum = commi.num)break ;if(i=m)printf( "没有找到 .n" );getch();return ;printf( "已经找到记录，是否删除？(y/n):n");scanf( "%s",ch);if(strcmp(ch,"Y")=0|strcmp(

15、ch,"y")=0)for (j=i;j<m;j + )commj=commj+1;m -;printf( "删除成功 .n" );if(fp =fopen( "data.txt","wb" ) = NULL)printf( "不能打开文件！ n" );return ;for (i=0;i<m;i +)专业资料if(fwrite( & commj,LEN,1,fp)!= 1)printf( "不能保存！ n" );getch();fclose(fp);/*

16、自定义商品记录修改函数 */void modify()int i,m =0,snum;char ch2;FILE*fp;if(fp =fopen( "data.txt","ab+" )= NULL)printf( "不能打开文件！ n" );return ;while (!feof(fp)if(fread( &commm,LEN,1,fp)=1)m +;fclose(fp); if(m = 0)printf( "无商品记录 .n" );专业资料fclose(fp);return ;printf( "

17、;请输入您要修改信息的编号:n" );scanf( "%d",& snum);for (i=0;i<m;i +)if(snum = commi.num)break ;if(i<m)printf( "已经找到该记录，是否修改？(y/n):n");scanf( "%s",ch);if(strcmp(ch,"Y")= 0|strcmp(ch,"y")= 0)printf( "商品名 :n" );scanf( "%s",commi.n

18、ame);printf( "单价 :n" );scanf( "%lf",& commi.price);printf( "数量 :n" );scanf( "%lf",& commi.num);commi.total =commi.count *commi.price;专业资料elsereturn ;elseprintf( "没有找到 .n" );getchar();return ;if(fp =fopen( "data.txt","wb" )

19、 =NULL)printf( "不能打开文件！ n" );return ;for (i=0;i<m;i + )if(fwrite( & commi,LEN,1,fp)!= 1)printf( "不能保存！ n" );getch();fclose(fp);/*自定义商品记录插入函数 */void insert()int i,m =0,j,k,snum;专业资料FILE*fp;if(fp =fopen( "data.txt","ab+" )= NULL)printf( "不能打开文件！ n&qu

20、ot; );return ;while (!feof(fp)if(fread( &commm,LEN,1,fp)= 1)m+ ;if(m = 0)printf( "无商品记录 .n" );fclose(fp);return ;printf( "请输入要插入记录的位置【即编号】:n" );scanf( "%d",& snum);for (i=0;i<m;i + )if(snum = commi.num)break ;for (j=m -1;j>i;j-)commj+1=commj;printf( "

21、请输入您要插入的信息 :n" );专业资料printf( "编号 :n" );scanf( "%d",& commi+1.num);for(k=0;k<m;k + )if(commk.num = commi+1.num && k!= i+1) printf( "该编号已经存在，按任意键继续 .n" ); getch();fclose(fp);return ;printf( "商品名 :n" );scanf( "%s",commi+1.name);print

22、f( "单价 :n" );scanf( "%lf",& commi+1.price);printf( "数量 :n" );scanf( "%lf",& commi+1.num);commi+1 .total =commi+1 .count *commi+1 .price;if(fp =fopen( "data.txt","wb" ) =NULL)printf( "不能打开文件！ n" );return ;for(k=0;k<m +1;k+)专业资料if(fwrite( & commk,LEN,1,fp)!=1)printf( "不能保存！ n" );getch();fclose(fp);/*自定义商品记录统计函数 */void total() int i,m =0;FILE*fp;if(fp =fopen( "data.txt" ,"ab+" )= NULL)printf( "不能打开记录！ n" );return ;wh