C语言设计实现销售管理系统源代码

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1、#include"stdio.h"#include"string.h"#include"stdlib.h"structgoods{charname[20];intprice;charpro[20];intkc;intxs;}s[30];voidadd();voidselect();voidupdate();voidcenter(){intk;printf("----------------------欢迎登陆销售管理系统--------------------");printf("");printf("");printf("");printf("

2、请输入您要操作的功能：");printf("1,添加商品信息2，查找商品信息3，修改商品信息4，退出系统");scanf("%d",&k);switch(k){case1:system("CLS");add();break;case2:system("CLS");select();break;case3:system("CLS");update();break;case4:exit(0);break;}}voidadd(){FILE*fp;fp=fopen("goods.txt","a");printf("请输入商品名称单价生产厂家库存量销售量");

3、scanf("%s%d%s%d%d",&s[0].name,&s[0].price,&s[0].pro,&s[0].kc,&s[0].xs);fwrite(&s[0],sizeof(structgoods),1,fp);printf("添加成功");fclose(fp);center();}voidselect(){inti;charname[20];intmoney,k;FILE*fp;fp=fopen("goods.txt","rb");printf("您是要查找1；按商品名称2；生产厂家：");scanf("%d",&k);switch(k){ca

4、se1:printf("请输入商品名称：");scanf("%s",&name);for(i=0;i<30;i++){fread(&s[i],sizeof(structgoods),1,fp);if(strcmp(s[i].name,name)==0){printf("销售量金额库存量为：");money=s[i].price*s[i].xs;printf("%dt%dt%d",s[i].xs,money,s[i].kc);}}break;case2:printf("请输入生产厂家：");scanf("%s",&name);for(i=0;i

5、<30;i++){fread(&s[i],sizeof(structgoods),1,fp);if(strcmp(s[i].pro,name)==0){printf("销售量金额库存量为：");money=s[i].price*s[i].xs;printf("%dt%dt%d",s[i].xs,money,s[i].kc);}}break;}fclose(fp);center();}voidupdate(){inti;charname[20];intup,k;FILE*fp;fp=fopen("goods.txt","rb");for(i=0;i<3

6、0;i++){fread(&s[i],sizeof(structgoods),1,fp);}fclose(fp);if((fp=fopen("goods.txt","wb"))!=NULL)printf("请输入您要修改的商品名称：");scanf("%s",name);printf("您要修改：1，库存量2，销售量");scanf("%d",&k);switch(k){case1:for(i=0;i<30;i++){if(strcmp(s[i].name,name)==0){printf("请输入您要修改的值：");scanf("%d",&up);

7、s[i].kc=up;printf("修改成功");}fwrite(&s[i],sizeof(structgoods),1,fp);}break;case2:for(i=0;i<30;i++){if(strcmp(s[i].name,name)==0){printf("请输入您要修改的值：");scanf("%d",&up);s[i].xs=up;printf("修改成功");}fwrite(&s[i],sizeof(structgoods),1,fp);}break;}fclose(fp);center();}intmain(){center();

8、}