supermarket.cpp

用C语言编程实现 简单超市管理功能。包括 商品的管理(添加、修改、删除、查找)、商品的销售.可作为学习C语言和C语言课程设计的参考.

	  printf("还没有记录，请加入记录!\n\n");
	  printf("输入1加入记录，其它退出程序\n");
	  scanf("%d",&on);
	  system("cls");
	  if(1!=on)
	  exit(0);
	  else
	  while(1)
	  {
		  printf("产品种类说明：");
		  printf("   A.生活用品  B.食品");
          printf("  C.文化用品  D.其它\n\n");
		  if(!creat(head))
		  {   
			  fflush(stdin);
			  break;
		  }
	  }
      save();       
	  return;   
	}
	if((fp=fopen("fname","rb"))==NULL)
    {
        printf("can not open out file!\n");
        exit(0);
	}
    fscanf(fp1,"%d",&mm);
	fclose(fp1);
	printf("已有商品数%d\n",mm);             //用来查看mm的值是否正确的
	system("pause");                 //用来检查错误的
	for( i=0;i<mm;i++)
    {
        if(head==NULL)
        {
            head=(struct sell*)malloc(sizeof(struct sell));
            head->next=NULL ;     //建立一个无效的头结点
        }
        pt=(struct sell*)malloc(sizeof(struct sell));
        if(pt==NULL)
        {
            printf("申请内存失败!");
            exit(0);
        }
		fread(pt,sizeof(struct sell),1,fp);
        pt->next=head;
		head=pt;
	}
        fclose(fp);
mm=0;           
}

void save()
{
    if(head==NULL)
	 {
		 printf("没有可保存的数据！");
         system("pause");
		 return;
	 }
     struct sell *savepian;
     FILE *fp; 
     FILE *fp1;
	 if((fp1=fopen("fname1","wb+"))==NULL)
	 {
		 printf("没有数据");
	     exit(0);
	 }
		if((fp=fopen("fname ", "wb+"))==NULL)
		{
		   printf("can not open file\n");
		   exit(0);
		}
	
		for(savepian=head;savepian->next!=NULL;savepian=savepian->next)
		{
		fwrite(savepian,sizeof(struct sell),1,fp);
	    fflush(stdin);
        mm++;
		}
	fclose(fp);
    fprintf(fp1,"%d",mm);
	fclose(fp1);
    mm=0;
}
int  xiugai(SELL *phead)            
{
	char c;
	printf("输入y确认修改\n");
	c=getchar();
	fflush(stdin);
	if(c=='y')
	{printf("输入一个数据就按一次回车:\n");
    printf("输入  商品名字、价格、编号(整型)");
    printf("数量、入库日期(例040101)、种类\n\n");
	printf("名字:");
    scanf("%s",phead->name);
	printf("进货价格:");
	scanf("%f",&phead->gain);
	printf("销售价格：");
    scanf("%f",&phead->price);
	printf("编号(整型):");
    scanf("%d",&phead->number);
	printf("数量:");
    scanf("%d",&phead->amount);
	printf("日期:");
    scanf("%s",phead->date);
    fflush(stdin);
	printf("种类（A,B,C,D）:");
	while(1)
    {
		scanf("%c",&phead->kind);
		if('A'==phead->kind)break;
		if('B'==phead->kind)break;
		if('C'==phead->kind)break;
		if('D'==phead->kind)break;
		printf("请输入正确种类符号:");
		fflush(stdin);
	}
    system("cls");
    printf("已改为如下数据\n");
    printf("   商品名字     价格      编号     数量       日期      种类\n");
    printf("%10s%10.2f%10d",phead->name,phead->price,phead->number);
    printf("%10d%10s%10c\n",phead->amount,phead->date,phead->kind);
	system("pause");
	}
	else
	return 1;
	return 1;
}
void banchuan()
{
	int k=0,m=3,n=1,t=0,ll=0;
	printf("                              课");
	for(ll=0;ll<=80000000;ll++);
	printf("程");
	for( ll=0;ll<=80000000;ll++);
	printf("设");
	for( ll=0;ll<=80000000;ll++);
	printf("计\n\n");
	//for( ll=0;ll<=80000000;ll++);
	printf("                计036班    邹英斌    学号:2003041256\n\n");
	system("pause");
	system("cls");

}
void user()
{
    char choice='1' ;
    if(present.user_kind!='A')
    {
        printf("对不起！你不是管理员，不能执行这项操作\n");
		system("pause");
        return ;
    }
    while(1)
    {
        system("cls");
        printf("            1.增加用户        2.删除用户\n");
        printf("            3.修改密码        0.返回上一级菜单\n");
        while(1)
        {
            fflush(stdin);
            printf("请输入你的选择:");
            scanf("%c",&choice);
            fflush(stdin);
            if('1'==choice||'2'==choice||'3'==choice||'0'==choice)break ;
            else 
            {
                system("cls");
                printf("输入有错，请在0--3之间选择\n");
            }
        }
        switch(choice)
        {
            case '1' :
            user_add();
            break ;
            case '2' :
            user_del();
            break ;
            case '3' :
            user_modify_password();
            break ;
            case '0' :
            return ;
            break ;
        }
    }
}
void user_read()
{
    FILE*fp3,*fp4 ;
    struct users*pt,*pian ;
    char name[20],mima[7];
    int t=0,i=0,j=0,k=0,flag=0 ;
    if(user_head==NULL)
    {
        pt=(struct users*)malloc(sizeof(struct users));
        pt->next=NULL ;
        user_head=pt ;
    }
    if((fp3=fopen("username","rb"))!=NULL&&(fp4=fopen("usercount","rb"))!=NULL)
    {
        fscanf(fp4,"%d",&t);
        fclose(fp4);
        for(i=0;i<t;i++)
        {
            pt=(struct users*)malloc(sizeof(struct users));
            fread(pt,sizeof(struct users),1,fp3);
            pt->next=user_head ;
            user_head=pt ;
        }
        fclose(fp3);
    }
    if(user_head->next==NULL)
    {
        printf("还没创建用户，请在进入后创建用户！\n");
        present.user_kind='A' ;
    }
    else 
    {
        while(1)
        {
            printf("输入用户名:");
            scanf("%20s",name);
            fflush(stdin);
            for(pian=user_head;pian->next!=NULL;pian=pian->next)
            {
                if(!strcmp(name,pian->user_name))
                {
                    while(1)
                    {
                        printf("输入密码:");
                        for(i=0;i<6;i++)
						{
	  	                   mima[i]=getch();
		                   printf("*");
						}
						mima[6]='\0';
                        printf("\n");
						fflush(stdin);
                         addpassword(mima);
                        if(!strcmp(mima,pian->user_password))
                        {
                            strcpy(present.user_name,pian->user_name);
                            strcpy(present.user_password,pian->user_password);
                            present.user_kind=pian->user_kind ;
                            printf("\n欢迎用户  %s!\n",pian->user_name);
                            flag=1 ;
							pre=pian;
                            break ;
                        }
                        else printf("密码不正确！\n");
                        j++;
                        if(3==j)exit(0);
                    }
                    break ;
                }
            }
            k++;
            if(1==flag)break ;
            else printf("用户名错误!\n");
            if(3==k)exit(0);
        }
	}
    fflush(stdin);
    //system("pause");
}
void user_add()
{
    FILE*fp3,*fp4 ;
	int i=0;
    struct users*u_pian,*add_user ;
    add_user=(struct users*)malloc(sizeof(struct users));
    if(add_user==NULL)
    {
        printf("申请内存失败！程序退出\n");
        system("pause");
        exit(0);
    }
    int count=0 ;
    printf("输入用户名：\n");
    scanf("%20s",add_user->user_name);
    printf("输入密码:");
    for(i=0;i<6;i++)
	{
	  add_user->user_password[i]=getch();
	  printf("*");
	}
    add_user->user_password[6]='\0';
	addpassword(add_user->user_password);
    printf("\n");
	fflush(stdin);
    printf("用户种类A--管理员，其它为普通用户\n");
    fflush(stdin);
    while(1)
    {
        scanf("%c",&add_user->user_kind);
        if(add_user->user_kind=='A'||add_user->user_kind=='B')break ;
        else printf("输入错误！只能输入A或B\n");
    }
    add_user->next=user_head ;
    user_head=add_user ;
    if((fp3=fopen("username","wb+"))!=NULL)
    //进行写文件操作
    for(u_pian=user_head;u_pian->next!=NULL;u_pian=u_pian->next)
    {
        fwrite(u_pian,sizeof(struct users),1,fp3);
        count++;
    }
    fclose(fp3);
    if(count!=0)
    {
        if((fp4=fopen("usercount","wb+"))!=NULL)
        fprintf(fp4,"%d",count);
        fclose(fp4);
    }
    fflush(stdin);
	printf("successfull!");
    system("pause");
}
void user_del()
{
    char del_name[20];
    FILE*fp3,*fp4 ;
    struct users*del_pian,*cd,*cc,*d_pian ;
    int count=0 ,flag=0;
    printf("输入你要删除的用户名：");
    scanf("%20s",del_name);
	fflush(stdin);
    if(user_head!=NULL&&user_head->next!=NULL)
    {
        for(del_pian=user_head;del_pian->next!=NULL;cc=del_pian,del_pian=del_pian->next)
        {
			if(!strcmp(del_pian->user_name,del_name))
            {
                if(del_pian==user_head)
                {  
                    cd=user_head ;
                    user_head=user_head->next ;
                    free(cd);
                    
                }
                else 
                {
                    cd=del_pian ;
                    cc->next=cd->next ;
                    //free(cd);
                }
				printf("删除成功！");
				flag=1;
				printf("\npress any key continu!");
				getch();
				break ;
            }
            
        }
        if((fp3=fopen("username","wb+"))!=NULL)
        for(d_pian=user_head;d_pian->next!=NULL;d_pian=d_pian->next)
        {
            fwrite(d_pian,sizeof(struct users),1,fp3);
            count++;
        }
        fclose(fp3);
        if(count!=0)
        {
            if((fp4=fopen("usercount","wb+"))!=NULL)
            fprintf(fp4,"%d",count);
            fclose(fp4);
        }
		else
		{
			if((fp4=fopen("usercount","wb+"))!=NULL)
			fprintf(fp4,"%d",count);
			fclose(fp4);
		}
        fflush(stdin);
		if(flag==1)return;
    }
    else printf("还没有用户！");
	printf("删除失败!\n");
	system("pause");
}
void user_modify_password()
{
    char secret[7],secrets[7];
	int count=0,i=0;
	struct users *m_pian;
	FILE *fp3,*fp4;
	printf("只能修改当前用户密码!\n");
    printf("输入旧密码");
    for(i=0;i<6;i++)
	{
     secret[i]=getch();
     printf("*");
	}
    secret[6]='\0';
	addpassword(secret);
    printf("\n");
    fflush(stdin);
	if(!strcmp(secret,pre->user_password))
	{
		printf("输入新密码:");
		for(i=0;i<6;i++)
		{
          secret[i]=getch();
          printf("*");
		}
          secret[6]='\0';
          printf("\n");
          fflush(stdin);
		printf("再次输入密码");
		for(i=0;i<6;i++)
		{
          secrets[i]=getch();
          printf("*");
		}
          secrets[6]='\0';
          printf("\n");
          fflush(stdin);
		if(!strcmp(secrets,secret))
		{
			addpassword(secrets);
			strcpy(pre->user_password,secrets);
			printf("successfull!");
			if((fp3=fopen("username","wb+"))!=NULL)
            for(m_pian=user_head;m_pian->next!=NULL;m_pian=m_pian->next)
			{
            fwrite(m_pian,sizeof(struct users),1,fp3);
            count++;
			}
            fclose(fp3);
            if(count!=0)
			{
            if((fp4=fopen("usercount","wb+"))!=NULL)
            fprintf(fp4,"%d",count);
            fclose(fp4);
			}
            fflush(stdin);
		}
		else printf("两 次输入密码不一致！fail");
	}
	else printf("旧密码不正确!");
    system("pause");
}