bookms.c

简单的实现了图书馆管理系统

    }
    printf("\nThere are  %d  matching records!\n", match_total);
    if(match_total)
    {
        printf("Press P to continur, Press else key to return!\n");
        ch = getch();
        if(ch=='p'||ch=='P')
            Search_By_BookID();
        else
            return;
    }
    else
    {
        printf("Press any key to continue!\n");
        getch();
    }

    return;
}



/*******************************************************/

void Search_By_Press()
{
    int i, loop, match_total=0;
    char ch, instr[PRESSSZ], press_str[PRESSSZ], temp_str[PRESSSZ];
    printf("Please Input Book'press's fullname(1~15 chars):\n");
    gets(instr);
    while(strlen(instr) > PRESSSZ-1)
    {
        printf("Wrong input, it is too long!\n");
        printf("Please Input Book'press's fullname(1~15 chars):\n");
        gets(instr);
    }
    sprintf(press_str, "%-15s", instr);

    for(i=0; i<book_record_Total; i++)
    {
        loop = Load_Book_Record(i);
        if(loop != 1)
            continue;
        strcpy(temp_str, cur_book_ptr->Press);
        loop = strcmp(strlwr(temp_str), strlwr(press_str));
        if(!loop)
        {
            match_total++;
            if(match_total % PAGESIZE==1)
            {
                clrscr();
                printf(" Number|        Name        |     Writer    |     Press     | Pub-Time |In-Lib\n");
                printf("-------------------------------------------------------------------------------\n");
            }
            Display_Record(cur_book_ptr);
            free(cur_book_ptr);
            cur_book_ptr = NULL;
            if(match_total % PAGESIZE==0)
            {
                printf("Press any key to the next page!\n");
                getch();
            }
        }
    }
    printf("\nThere are  %d  matching records!\n", match_total);
    if(match_total)
    {
        printf("Press P to continur, Press else key to return!\n");
        ch = getch();
        if(ch=='p'||ch=='P')
            Search_By_BookID();
        else
            return;
    }
    else
    {
        printf("Press any key to continue!\n");
        getch();
    }

    return;
}



/************************************************************/
/*        Select a book and process this book               */

void Select_And_Display(int num)
{
    int loop;

    if(num >= book_record_Total)
    {
        printf("The book is not exist!\n");
        printf("Press any key to return:\n");
        getch();
        return;
    }
    else
    {
        loop = Load_Book_Record(num);
        if(loop==-1)
        {
            printf("The book has been deleted! \n");
            getch();
        }
        if(loop > 0)
        {
            Display_curBook_Detail();
            printf("Press any key to continue!\n");
            getch();
            free(cur_book_ptr);  /*释放指针   */
            cur_book_ptr = NULL;
        }
        return;
    }
}




/****************************************************/

void Display_curBook_Detail()
{
    char num;
    clrscr();

    num = atoi(cur_book_ptr->rdID);
    Load_Reader_Record(num);
    printf("\n");
    printf("\t\t     The Book's Detailed Information    \n");
    printf("\t\t------------------------------------------\n");
    printf("\t\t|   Book ID :  %s                     |\n", cur_book_ptr->bkID);
    printf("\t\t|   Book Name :  %s    |\n", cur_book_ptr->bkName);
    printf("\t\t|   Writer :  %s            |\n", cur_book_ptr->writer);
    printf("\t\t|   Press :  %s             |\n", cur_book_ptr->Press);
    printf("\t\t|   Publish Time :  %s             |\n", cur_book_ptr->pubTime);

    if(cur_book_ptr->curStatus=='1')
    {
    printf("\t\t| Current Status :  OUT                  |\n");
    printf("\t\t------------------------------------------\n");
    printf("\t\t             Reader Information\n ");
    printf("\t\t------------------------------------------\n");
    printf("\t\t|   Reader ID:  %s                    |\n", cur_reader_ptr->rdID);
    printf("\t\t|   Reader Name:  %s        |\n", cur_reader_ptr->Name);
    printf("\t\t|   Reader Grade:  %s                  |\n", cur_reader_ptr->Grade);
    printf("\t\t|   Reader Major:  %s       |\n", cur_reader_ptr->Major);
    printf("\t\t------------------------------------------\n");
    }
    else
    {
    printf("\t\t|   Current Status :  IN                 |\n");
    printf("\t\t------------------------------------------\n");
    }

    printf("\n");
    free(cur_reader_ptr);
    cur_reader_ptr = NULL;

    return;
}



/*************************************************/
/*        Display the list of all book           */

void Display_Book_List()
{
    int i, dsp_total=0;
    int loop;

    clrscr();
    if(book_record_Total==0)
    {
        printf("There is no book!\n");
        return;
    }
    
    for(i=0; i<book_record_Total; i++)
    {
        loop = Load_Book_Record(i);
        if(loop != 1) continue;
        dsp_total++;
        if(dsp_total % PAGESIZE==1)
        {
            clrscr();
            printf(" Number|        Name        |     Writer    |     Press     | Pub-Time |In-Lib\n");
            printf("-------------------------------------------------------------------------------\n");
        }
        Display_Record(cur_book_ptr);

        /*************释放指针(释放内存空间是很重要的)*************** */
        /* ### my_debug printf("Release Memory:\n");  */
        free(cur_book_ptr);
        cur_book_ptr = NULL;
        if(dsp_total % PAGESIZE==0)
        {
            printf("\nPress any key to the next page!\n");
            getch();
        }
    }
    loop = book_record_Total-book_delete_total;
    printf("\nThere are  %d  books total.\n", loop);

    return;
}



/************************************************************/
/* display one node pointed out by the parameter(new_node)  */

void Display_Record(struct BookNode* new_node)
{

   printf(" %s |", new_node->bkID);
   printf("%s|", new_node->bkName);
   printf("%s|", new_node->writer);
   printf("%s|", new_node->Press);
   printf(" %s |", new_node->pubTime);
   if(new_node->curStatus=='1')
      printf("  Out");
   else
      printf("  In");
   printf("\n");

   return;
}



/***********************************************/

void  Lend_Book()
{
    int num1, num2, loop;
    const int max = ONCEMAX;

    char stime_str[TIMESZ], etime_str[TIMESZ];

    /* 读入读者证号 */
    num1 = Get_Reader_ID();
    if(num1==-1)   /* 操作取消 */
        return;

    /* 看该读者是否存在 */
    loop = Load_Reader_Record(num1);
    if(loop != 1)
    {
        printf("The Reader is not exsit!\n");
        printf("Press any key to return!\n");
        getch();
        return;
    }

    /* 载入借阅记录 */
    Load_Lend_Record(num1);

    /* 达到最大借书数目时，不能再借，返回 */
    if(cur_lend_ptr->bkCount-48==max)
    {
     printf("Sorry! You have borrowed %d books!\n", max);
     printf("You could not borrow anymore!\n");
     printf("Press any key to return!\n");
     getch();
     return;
    }

    /* 读入书号 */
    num2 = Get_Book_ID();
    if(num2==-1)   /* 操作取消 */
        return;

    /* 载入书目记录 */
    loop = Load_Book_Record(num2);
    if(loop==-1)
    {
        printf("Press any key to return!\n");
        getch();
        return;
    }

    /* 该书已经借出，不能再借，返回*/
    if(cur_book_ptr->curStatus=='1')
    {
        printf("Error! The book is lended out!\n");
        printf("Press any key to return!\n");
        getch();
        return;
    }

    /* 修改书目记录 */
    cur_book_ptr->curStatus = '1';
    strcpy(cur_book_ptr->rdID, cur_reader_ptr->rdID);

    /* 修改借阅记录 */
    cur_lend_ptr->bkCount++;   /*借书书目加1*/
    loop = cur_lend_ptr->bkCount-48;
    strcpy(cur_lend_ptr->bkID[loop-1], cur_book_ptr->bkID);

    /* 计算借书时间和还书时间 */
    Calculate_Time(stime_str, etime_str);
    strcpy(cur_lend_ptr->StartTime[loop-1], stime_str);
    strcpy(cur_lend_ptr->EndTime[loop-1], etime_str);

    /* 保存记录，将修改写入文件 */
    Save_cur_Book_Node();
    Save_cur_Lend_Node();

    /* 释放指针 */
    free(cur_book_ptr);
    cur_book_ptr = NULL;
    free(cur_lend_ptr);
    cur_lend_ptr = NULL;

    printf("Lend out successfully!\n");
    getch();

    return;
}


/*************************************************/

void Calculate_Time(char *startTime, char *endTime)
{
    int loop;
    char instr[TIMESZ], mon_str[TIMESZ], day_str[TIMESZ];
    struct date *cur_date;

    cur_date = (struct date *)malloc(sizeof(struct date));

    /*自动获得当前日期作为借出时间  */
    getdate(cur_date);
    sprintf(instr, "%d", cur_date->da_year);
    sprintf(mon_str, "%d", cur_date->da_mon);
    sprintf(day_str, "%d", cur_date->da_day);

    if(cur_date->da_mon < 10)
        strcat(instr, "0");
    strcat(instr, mon_str);

    if(cur_date->da_day < 10)
        strcat(instr, "0");
    strcat(instr, day_str);
    instr[TIMESZ-1] = '\0';
    strcpy(startTime, instr);

    /*由借出时间得出应还时间 */
    loop = Days_Per_Month(cur_date->da_year, cur_date->da_mon);  /* 计算当前月最大天数 */

    cur_date->da_mon += (cur_date->da_day + MaxTime) / loop;
    cur_date->da_day  = (cur_date->da_day + MaxTime) % loop;
    cur_date->da_year += cur_date->da_mon / 12;
    cur_date->da_mon  =  cur_date->da_mon % 12;
    sprintf(instr, "%d", cur_date->da_year);
    sprintf(mon_str, "%d", cur_date->da_mon);
    sprintf(day_str, "%d", cur_date->da_day);

    if(cur_date->da_mon < 10)
        strcat(instr, "0");
    strcat(instr, mon_str);

    if(cur_date->da_day < 10)
        strcat(instr, "0");
    strcat(instr, day_str);
    strcpy(endTime, instr);

    free(cur_date);
    cur_date = NULL;

    return;
}


/********************************************/

void Return_Book()
{
    int temp, loop, i;
    int num1, num2;

    /* 读入要还的书号 */
    num1 = Get_Book_ID();
    if(num1==-1)   /* 操作取消 */
        return;

    /* 载入书目记录 */
    loop = Load_Book_Record(num1);
    if(loop==-1)
    {
        printf("Press any key to return!\n");
        getch();
        return;
    }

    /* 该书已经在馆，返回错误 */
    if(cur_book_ptr->curStatus=='0')
    {
        printf("Error! The book is in the library!\n");
        printf("Press any key to return!\n");
        getch();
        return;
    }

    /* 获得该书当前的借阅者读者号 */
    num2 = atoi(cur_book_ptr->rdID);

    /* 载入借阅记录 */
    Load_Lend_Record(num2);
    if(loop==-1)
    {
        printf("Press any key to return!\n");
        getch();
        return;
    }

    /* 修改书目记录 */
    cur_book_ptr->curStatus = '0';
    strcpy(cur_book_ptr->rdID, "*****");

    temp = cur_lend_ptr->bkCount-48; /* 借的书的数目 */
    cur_lend_ptr->bkCount--;   /*借书数目减1*/

    /* 修改存放的所借的书目 */
    if(temp==1)
    {
        strcpy(cur_lend_ptr->bkID[0], "*****");
        strcpy(cur_lend_ptr->StartTime[0], "********");
        strcpy(cur_lend_ptr->EndTime[0], "********");
    }
    if(temp > 1)  /* 当借书数目大于1时，应在数组中找到该书 */
    {
        for(i=0; i<temp; i++)
        {
            loop = strcmp(cur_lend_ptr->bkID[i], cur_book_ptr->bkID);
            if(loop==0)
            {
                if(i==temp-1) /* 该书为所借书中最后一本 */
                {
                    strcpy(cur_lend_ptr->bkID[i], "*****");
                    strcpy(cur_lend_ptr->StartTime[i], "********");
                    strcpy(cur_lend_ptr->EndTime[i], "********");
                }
                else
                {    /* 记录前移 */
                    for(; i<temp-1; i++)
                    {
                        strcpy(cur_lend_ptr->bkID[i], cur_lend_ptr->bkID[i+1]);
                        strcpy(cur_lend_ptr->StartTime[i], cur_lend_ptr->StartTime[i+1]);
                        strcpy(cur_lend_ptr->EndTime[i], cur_lend_ptr->EndTime[i+1]);
                    }
                    strcpy(cur_lend_ptr->bkID[temp-1], "*****");
                    strcpy(cur_lend_ptr->StartTime[temp-1], "********");
                    strcpy(cur_lend_ptr->EndTime[temp-1], "********");
                }
                break;
            }
        }
    }

    /* 保存记录，将修改写入文件 */
    Save_cur_Book_Node();
    Save_cur_Lend_Node();

    /* 释放指针 */
    free(cur_book_ptr);
    cur_book_ptr = NULL;
    free(cur_lend_ptr);
    cur_lend_ptr = NULL;

    printf("Return successfully!\n");
    getch();

    return;
}



/*****************************************************/
/* delete the book pointed out by pointer(cur_book_ptr)  */

void Delete_Book()
{
    int num, loop, step, result;
    FILE *wfp;

    num = Get_Book_ID();
    if(num==-1)   /* 操作取消 */
        return;

    loop = Load_Book_Record(num);
    if(loop==-1)
    {
        printf("The book is not exsit!\n");
        printf("Press any key to return!\n");
        getch();
        return;
    }

    /* 该书已经借出，不能删除，返回*/
    if(cur_book_ptr->curStatus=='1')
    {
        printf("Sorry! The book is lended out, You can not delete it!\n");
        printf("Press any key to return!\n");
        getch();
        return;
    }

    result = Delet_Verify();
    if(result != 1)
    {
         printf("Delete Cancled!\n");
         printf("Press any key to return!\n");
         getch();
         return;