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#include<stdio.h>
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#include<stdlib.h>
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#include<conio.h>
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#include<string.h>
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struct infor {
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char ID[50];
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char NAME[50];
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float PRICE;
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long NUMBER;
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}g[1000],m[1000],x;
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struct inf {
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char id[50];
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char name[50];
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float price;
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long number;
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}c;
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FILE *p;
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void menu_s();
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void input();
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void output();
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void check();
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void updata();
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void add();
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void dele();
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int len();
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int len2();
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int main()
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{
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system("cls");//清屏
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int n;
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menu_s();
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scanf("%d",&n);
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while(n)
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{
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system("cls");
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switch(n)
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{
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case 1:
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input() ;break;
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case 2:
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output();break;
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case 3:
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updata();break;
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case 4:
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check();break;
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case 5:
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return 0;
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}
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getch();
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menu_s();
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scanf("%d",&n);
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}
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}
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void menu_s ()
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{
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printf("----------------------------\n");
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printf("***********主菜单***********\n");
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printf("*********1:商品入库*********\n");
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printf("*********2:商品出库*********\n");
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printf("*********3:更新库存*********\n");
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printf("*********4:查询库存*********\n");
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printf("*********5:退出系统*********\n");
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printf("*********请输入选项*********\n");
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printf("----------------------------\n");
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}
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void input()
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{
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int i=0,s;
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char next[2]="y";
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p=fopen("1.txt","wb+");
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if(p==NULL)
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{
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printf("打开文件失败\n");
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fclose(p);
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exit(0);
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}
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while(strcmp(next,"y")==0||strcmp(next,"Y")==0)
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{
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printf("\n请输入商品编号\n");
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scanf("%s",g[i].ID );
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printf("\n请输入商品名称\n");
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scanf("%s",&g[i].NAME );
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printf("\n请输入商品价格\n");
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scanf("%f",&g[i].PRICE );
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printf("\n请输入商品数量\n");
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scanf("%d",&g[i].NUMBER );
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fwrite(&g[i],sizeof(struct infor),1,p);/*向文件写入数据*/
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printf("\n继续输入（y(Y)/n(N)）\n");
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fflush(stdin);//清空缓存区。
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i++;
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scanf("%s",next);
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}
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fclose(p);
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}
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int len()//读取当前文件长度
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{ int z=0;
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p=fopen("1.txt","r+");
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if(p==NULL)
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{
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printf("打开文件失败\n");
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exit(1);
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}
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rewind(p);//将文件指针移至文件开头。
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while(!feof(p))
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{
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if((fread(&g[z],sizeof(struct infor),1,p))==1);
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z++;
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}
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fclose(p);
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return z-1;
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}
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int len2()//读取当前文件长度
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{ int z=0;
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FILE *fp;
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fp=fopen("3.txt","r+");
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if(fp==NULL)
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{
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printf("打开文件失败\n");
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exit(1);
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}
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rewind(fp);//将文件指针移至文件开头。
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while(!feof(fp))
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{
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if((fread(&c,sizeof(struct inf),1,fp))==1);
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z++;
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}
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fclose(fp);
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return z;
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}
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void check()
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{
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int i,s=0;
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long length;
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p=fopen("1.txt","rb+");
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if(p==NULL)
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{
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printf("打开文件失败\n");
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exit(1);
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}
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printf("\n----------------------------------------------------\n商品列表\n----------------------------------------------------\n");
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printf("编号\t\t品名\t\t价格\t\t数量\n");
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rewind(p);//将文件指针移至文件开头。
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s=len();
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rewind(p);
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fread(g,sizeof(struct infor),s,p);
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for(i=0;i<s;i++)
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printf("%-10s\t%s\t\t%.1f\t\t%ld\n",g[i].ID ,g[i].NAME ,g[i].PRICE,g[i].NUMBER );
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printf("----------------------------------------------------\n");
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fclose(p);
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}
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void output()
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{
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FILE *p,*fp;
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char a[50],next[2]="y";
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int i,j,l,sum=0,num=0,s;
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p=fopen("1.txt","rb+");
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fp=fopen("3.txt","wb+");
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while(strcmp(next,"y")==0||strcmp(next,"Y")==0)
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{
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l=len();
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printf("请输入售出的商品名称\n");
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scanf("%s",&a[50]);
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for(i=0;i<l;i++)
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{
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fseek(p,sizeof(struct infor)*(i),0);
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fscanf(p,"%s%s%d%d",&c.id ,&c.name ,&c.price ,&c.number );//printf("%-10s\t%s\t\t%.1f\t\t%ld\n",c.id ,c.name ,c.price ,c.number);
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}
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fclose(fp);
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printf("\n继续输入（y(Y)/n(N)）\n");
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scanf("%s",next);
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}
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s=len2();
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fp=fopen("3.txt","rb+");
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printf("\n----------------------------------------------------\n商品列表\n----------------------------------------------------\n");
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for(i=0;i<s;i++)
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{
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fseek(fp,sizeof(struct inf)*(i),0);
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fscanf(fp,"%s%s%d%d",&c.id ,&c.name ,&c.price ,&c.number );
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num+=c.price ;
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printf("%-10s\t%s\t\t%.1f\t\t%ld\n",c.id ,c.name ,c.price ,c.number);
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printf("总销售额：\t\t\t\t\t%d\n",num);
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}
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fclose(fp);
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printf("----------------------------------------------------");
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}
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void updata()
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{
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int a;
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printf("\n请选择：1删除商品信息；2添加商品信息\n");
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scanf("%d",&a);
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switch(a)
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{
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case 1:dele();break;
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case 2:add();break;
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}
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}
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void add()
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{
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FILE *P;
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int i=0;
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char next[2]="y";
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while(strcmp(next,"y")==0||strcmp(next,"Y")==0)
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{
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printf("\n请输入商品编号\n");
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scanf("%s",&g[i].ID );
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printf("\n请输入商品名称\n");
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scanf("%s",&g[i].NAME );
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printf("\n请输入商品价格\n");
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scanf("%f",&g[i].PRICE );
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printf("\n请输入商品数量\n");
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scanf("%d",&g[i].NUMBER );
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p=fopen("1.txt","ab");
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if(p==NULL)
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{
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printf("打开文件失败\n");
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exit(0);
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}
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fwrite(&g[i],sizeof(struct infor),1,p);/*向文件写入数据*/
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fclose(p);
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printf("\n继续输入（y(Y)/n(N)）\n");
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scanf("%s",next);
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}
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}
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void dele()
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{
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FILE *p,*fp;
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char r[50];
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int i=0,j,l;
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l=len();
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printf("请输入将要删除的商品名称\n");
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scanf("%s",&r);
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p=fopen("1.txt","rb+");
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fp=fopen("2.txt","wb+");
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for(i=0;i<l;i++)
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{
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fseek(p,sizeof(struct infor)*(i),0);
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fscanf(p,"%s%s%d%d",&c.id ,&c.name ,&c.price ,&c.number );
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if(strcmp(r,c.name )!=0)
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{
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fwrite(&c,sizeof(struct inf),1,fp);
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}
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}
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rewind(fp);
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fclose(p);
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p=fopen("1.txt","wb+");
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for(i=0;i<l-1;i++)
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{
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fseek(fp,sizeof(struct inf)*(i),0);
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fscanf(fp,"%s%s%d%d",&x.ID ,&x.NAME,&x.PRICE ,&x.NUMBER );
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fwrite(&x,sizeof(struct infor),1,p);
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}
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fclose(p);
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fclose(fp);
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}
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