C的数据库编程(1)

文章类别：C语言程序设计 | 发表日期:2008-9-24 14:36:18

#include <io.h>
#include <bios.h>
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
#include <dos.h>
#include <bios.h>
#include <fcntl.h>
#include <mem.h>
#include <math.h>
#include <string.h>
#include <malloc.h>
#include <time.h>

typedef unsigned short     num_range1;
typedef unsigned short      num_range2;
typedef unsigned short      error_num;

#define TRUE 1
#define FALSE 0
#define nil 0

typedef struct node *stu_p;
struct node {
    num_range1 number;
    char name[11];
    char sex;
    struct date birthdate;
    num_range2 experience;
    num_range2 force;
    num_range2 smartness;
    struct node *front;
    struct node *next;
} ;

FILE *db_file; //text文件类型出错

struct node *head,
     *current,
     *last;
int count,
    tmp;

char *command_line;//user command

/*字段缓冲变量*/
num_range1 number_c;
char name_c[11];

num_range2 experience_c;
char sex_c;
num_range2 force_c;
num_range2 smartness_c;
struct date birthdate_c;

/*过程和函数*/
student_database(); //是主函数

//布尔类型翻译出错
////////////////////////////////////
int  check_number();
int  check_sex();
int  check_birthdate();
int  check_experience();
int  check_force();
int  check_smartness();
///////////////////////////////////

error_num check_record();
int  condition_select();
void output_title();
void output_it();
void modify_it();
void swap_it();
void delete_it();
void add_record();
void insert_it();
void save_record();
void close_database();
void output_record();
void del_record();
void find_record();
void sort_record();
void modify_record();
void read_record();
void input_record();
void insert_record();
void command_select();
void optimize();

int  check_number (num_range1 check_object)
{

int function;

    if ((check_object >= 1) && (check_object <= 1000))
 function = TRUE;
    else
 function = FALSE;

    return(function);
}

int  check_sex (char check_object)
{

int function;

    if (check_object=='m'||check_object=='M'||check_object=='f'||check_object=='M')
 function = TRUE;
   else
 function = FALSE;

    return(function);
}

int  check_birthdate (struct date check_object)
{

int function;

    if ((check_object.da_year >= 1000) && (check_object.da_year <= 3000))
 if (check_object.da_mon==1||check_object.da_mon==3||
 check_object.da_mon==5||check_object.da_mon==7||check_object.da_mon==8||
 check_object.da_mon==10||check_object.da_mon==12)
     if (check_object.da_day<=31&&check_object.da_day>=1)
  function = TRUE;
     else
  function = FALSE;

 else if (check_object.da_mon==4||check_object.da_mon==6||
 check_object.da_mon==9||check_object.da_mon==11)
     if (check_object.da_day<=30&&check_object.da_day>=1)
  function = TRUE;
     else
  function = FALSE;
 else if (check_object.da_mon == 2)
     if ((check_object.da_year % 4 == 0) &&
      (check_object.da_year % 100 != 0) ||
      (check_object.da_year % 400 == 0))
  if (check_object.da_day<=29&&check_object.da_day>=1)
      function = TRUE;
  else
      function = FALSE;
     else if (check_object.da_day<=28&&check_object.da_day>=1)
  function = TRUE;
     else
  function = FALSE;
 else
     function = FALSE;
    else
 function = FALSE;

    return(function);
}

int  check_experience (num_range2 check_object)
{

int function;

    if (check_object<=100&&check_object>=0)
 function = TRUE;
    else
 function = FALSE;

    return(function);
}

int  check_force (num_range2 check_object)
{

int function;

    if (check_object<=100&&check_object>=0)
 function = TRUE;
    else
 function = FALSE;

    return(function);
}

int  check_smartness (num_range2 check_object)
{

int function;

    if (check_object<=100&&check_object>=0)
 function = TRUE;
    else
 function = FALSE;

    return(function);
}

error_num check_record (num_range1 *number_c,char *sex_c,struct date *birthdate_c,
num_range2 *experience_c,num_range2 *force_c,num_range2 *smartness_c)
{

int err_p;
error_num function;

    err_p = FALSE;    /*CHECK NUMBER*/
    if ((err_p == FALSE))
 if (check_number(*number_c))
     err_p = FALSE;
 else  {
     err_p = TRUE;
     function = 1;
 }    /*CHECK SEX*/
    if ((err_p == FALSE))
 if (check_sex(*sex_c))
     err_p = FALSE;
 else  {
            err_p = TRUE;
            function = 2;
        }    /*CHECK BIRTHDATE_C*/
    if ((err_p == FALSE))
        if (check_birthdate(*birthdate_c))
            err_p = FALSE;
 else  {
            err_p = TRUE;
            function = 3;
 }    /*CHECK experience*/
    if ((err_p == FALSE))
        if (check_experience(*experience_c))
            err_p = FALSE;
        else  {
            err_p = TRUE;
     function = 4;
        }    /*CHECK force*/
    if ((err_p == FALSE))
 if (check_force(*force_c))
     err_p = FALSE;
        else  {
     err_p = TRUE;
            function = 5;
        }    /*CHECK smartness*/
    if ((err_p == FALSE))
        if (check_smartness(*smartness_c))
            err_p = FALSE;
 else  {
            err_p = TRUE;
     function = 6;
 }    /*RETURN ERR_NUMBER*/
    if (err_p == FALSE)
 function = 0;

    return(function);
}

int  condition_select (char *condition_message)
{

int condition_code;
int function;

    printf("\n");
    printf("%s\n",condition_message);
    printf("           1 record 2 No 3 name 4 sex\n");

    printf("            5 birthday 6 experience 7 force 8 smartness\n");

    printf("\n");
    printf("choise:(1~8)");
    scanf("%d",&condition_code);
    function = condition_code;

    return(function);
}

void output_title(void)
{

    printf("\n");
    printf("    record   no    name    sex  birthday     experience    force    smartness\n");

}

void output_it (struct node *c,int n)
{

    printf("%7d",n);    /*数据输出*/
    printf("%7d",c->number);
    printf("%10s",c->name);
    printf("%6c",c->sex);
    printf("%6d /%2d/%2d",c->birthdate.da_year,c->birthdate.da_mon,
     c->birthdate.da_day);
    printf("%10d",c->experience);
    printf("%10d",c->force);
    printf("%10d",c->smartness);
    printf("\n");

}

void modify_it (struct node *c,struct node *l,int n)
{

    printf("modify %d input -1 ,still\n",n);
 printf("record %d\n",n);
 printf("No:");
 scanf("%d",&number_c);
 printf("name:");
 gets(name_c);
 gets(name_c);
 printf("sex(M,F):");
 scanf("%c",&sex_c);
 printf("birthda_day(1978 16 1):");
 scanf("%d %d %d",&birthdate_c.da_year,&birthdate_c.da_day,&birthdate_c.da_mon);
 printf("experience:");
 scanf("%d",&experience_c);
 printf("force:");
 scanf("%d",&force_c);
 printf("smartness:");
 scanf("%d",&smartness_c);
 printf("\n");
    if (number_c !=  - 1)
 if (check_number(number_c))
     c->number = number_c;
 else
     printf("out record\n");
    if (strcmp(name_c,"-1") != 0)
 strcpy (c->name,name_c);
    if (sex_c != '-')
 if (check_sex(sex_c))
     c->sex = sex_c;
 else
     printf("sex error\n");
    if ((birthdate_c.da_year !=  - 1) && (birthdate_c.da_mon !=  - 1) &&
     (birthdate_c.da_day !=  - 1))
 if (check_birthdate(birthdate_c))
     c->birthdate = birthdate_c;
 else
     printf("birthday error\n");
    if (experience_c !=  - 1)
 if (check_experience(experience_c))
     c->experience = experience_c;
 else
     printf("experience error\n");
    if (force_c !=  - 1)
 if (check_force(force_c))
     c->force = force_c;
 else
     printf("force error\n");
    if (smartness_c !=  - 1)
 if (check_smartness(smartness_c))
     c->smartness = smartness_c;
 else
     printf("smartness error\n");

}

void swap_it (struct node **current,struct node **last,struct node **c_bak,struct node **l_bak)
{
/*用于排序*/

struct node *tmp_c,
     *tmp_l;
/*使C_BAK总是指向链表尾部*/

    if (((*current)->front->front == nil) && (*last == nil)) {
 /*STATUS=4*/
        /*ONLY TWO*/        *current = (*current)->front;
        head = *c_bak;
        (*current)->front = head;
        (*c_bak)->next = *current;
 (*current)->next = nil;
        *last = nil;
 *c_bak = *current;
 *l_bak = nil;
    }    /*LAST ONE*/
    else if (((*current)->front->front != nil) && (*last == nil)) {
        *current = (*current)->front;
        (*current)->front->next = *c_bak;
        (*c_bak)->front = (*current)->front;
        (*c_bak)->next = *current;
        (*current)->front = *c_bak;
        (*current)->next = nil;
        *last = (*current)->next;
 *c_bak = *current;
        *l_bak = *last;
    }    /*SECOND ONE*/
    else if (((*current)->front->front == nil) && (*last != nil)) {
        head = *current;
        *current = (*current)->front;
        head->next->front = *current;
 (*current)->next = head->next;
        head->front = nil;
 head->next = *current;
        (*current)->front = head;
 *last = (*current)->next;
    }    /*MEDIUM*/
    else  {
 tmp_c = *current;
        *current = (*current)->front;
        (*current)->front->next = tmp_c;
        tmp_c->next->front = *current;
        tmp_c->front = (*current)->front;
        (*current)->next = tmp_c->next;
        tmp_c->next = *current;
        (*current)->front = tmp_c;
    }

}

void delete_it (struct node **current,struct node  **last)
{
/*可以自动后移指针*/

struct node *tmp;

    if ((*current == head) && (*last == nil)) {    /*statue = 4*/
    /*ONLY ONE*/
        free(*current);
        head = nil;
 *current = nil;
        *last = nil;
        count = 0;
    }    /*LAST ONE*/
    else if ((*current != head) && (*last == nil)) {
        *current = (*current)->front;
 free(*current);
        (*current)->next = *last;
        count = count - 1;
    }    /*FIRST ONE*/
    else if ((*current == head) && (*last != nil)) {
        head = *last;
 free(*current);
        *current = head;
        (*current)->front = nil;
 *last = (*current)->next;
        count = count - 1;
    }
    else  {
        (*current)->front->next = (*current)->next;
        (*current)->next->front = (*current)->front;
        tmp = *current;
        *current = *last;
        *last = (*current)->next;
 free(tmp);
        tmp = nil;
        count = count - 1;
    }    /*IF*/

}

/*PROCEDURE*/
void add_record (void)
{

struct node *tmp;

    if (head == nil) {
 tmp = (stu_p) malloc (sizeof(struct node));
 head = tmp;
 head->next = nil;
 current = head;
 current->front = nil;
 last = current->next;
    }
    else  {
 tmp = (stu_p) malloc (sizeof(struct node));
        tmp->next = nil;
 current->next = tmp;
        tmp->front = current;
 current = tmp;
        last = current->next;
    }    /*数据赋值*/
    current->number = number_c;
    strcpy (current->name,name_c);
    current->sex = sex_c;
    current->birthdate = birthdate_c;
    current->experience = experience_c;
    current->force = force_c;
    current->smartness = smartness_c;
    count = count + 1;

}

void insert_it (struct node **c,int n,int *p)
{

struct node *insert;
error_num err;

    *p = 0;
 printf("record %d\n",n);
 printf("No:");
 scanf("%d",&number_c);
 printf("name:");
 gets(name_c);
 gets(name_c);
 printf("sex(M,F):");
 scanf("%c",&sex_c);
 printf("birthda_day(1978 16 1):");
 scanf("%d %d %d",&birthdate_c.da_year,&birthdate_c.da_day,&birthdate_c.da_mon);
 printf("experience:");
 scanf("%d",&experience_c);
 printf("force:");
 scanf("%d",&force_c);
 printf("smartness:");
 scanf("%d",&smartness_c);
 printf("\n");
 err = check_record(&number_c,&sex_c,&birthdate_c,&experience_c,
  &force_c,&smartness_c);
 switch (err) {
     case 0:
  add_record();
  n = n + 1;
  *p=1;
  break;
     case 1:
  printf("no wrong:1-1000\n");

  printf("try again\n");
  break;
     case 2:
  printf("sex wrong:M male F female\n");

  printf("try again\n");
  break;
     case 3:
  printf("birthday wrong:1978 1 16\n");

  printf("try again\n");
  break;
     case 4:
  printf("experience wrong:0-100\n");

  printf("try again\n");
  break;
     case 5:
  printf("force wrong:0-100\n");

  printf("try again\n");
  bre ak;
     case 6:
  printf("smartness wrong:0-100\n");

  printf("try again\n");
  break;
 }
    if (*p == 1) {    /*NO DATA*/
        if (*c == nil) {
            add_record();
 }    /*FIRST ONE*/
 else if (*c == head) {
            insert = (stu_p) malloc (sizeof(struct node));
            insert->front = nil;
            insert->next = nil;
     head->front = insert;
            insert->next = head;
     head = insert;
            insert->number = number_c;
            strcpy (insert->name,name_c);
            insert->sex = sex_c;
            insert->birthdate = birthdate_c;
            insert->experience = experience_c;
     insert->force = force_c;
            insert->smartness = smartness_c;
            count = count + 1;
        }
        else  {
            insert = (stu_p) malloc (sizeof(struct node));
            insert->front = nil;
     insert->next = nil;
            (*c)->front->next = insert;
            insert->front = (*c)->front;
            (*c)->front = insert;
            insert->next = *c;
     insert->number = number_c;
            strcpy (insert->name,name_c);
     insert->sex = sex_c;
            insert->birthdate = birthdate_c;
            insert->experience = experience_c;
            insert->force = force_c;
            insert->smartness = smartness_c;
            count = count + 1;
 }
    }

}

void save_record (void)
{

int n;
char path[81];
struct node *c,
            *l;

    if (head == nil)
 printf("no record\n");
    else  {
 n = 0;    /*文件初始化*/
 printf("\n");
 printf("write file name ps:pb.TXT:\n");
 gets(path);
 db_file=fopen(path,"wt");    /*指针初始化*/
 c = head;
 l = head->next;
 fprintf(db_file,"%d\n",count);    /*写入最大记录数*/
 while (c != nil) {    /*数据输出*/
     fprintf(db_file,"%d",c->number);
     fprintf(db_file,"%10s",c->name);
     fprintf(db_file,"%2lc",c->sex);
     fprintf(db_file,"%5d%3d%3d",c->birthdate.da_year,
      c->birthdate.da_day,c->birthdate.da_mon);
     fprintf(db_file,"%4d",c->experience);
     fprintf(db_file,"%4d",c->force);
     fprintf(db_file,"%4d",c->smartness);
     fprintf(db_file,"\n");
            n = n + 1;
            c = l;
            l = c->next;
        }
 fclose(db_file);    /*保护代码*/
 if (n != count)
     printf("sum of record wrong\n");
 printf("have been saved\n");
    }

}

void close_database (int n)
{
/*N为内部使用,信息显示开关*/

struct node *c,
            *l;
int i;
char pan;

    if (head != nil) {
 c = head;
 l = c->next;
 pan = ' ';
 if (n == 1) {
     printf("\n");
     printf("save database?(Y/N)\n");
     scanf("%c",&pan);
     if (pan == 'Y')
                save_record();
            printf("\n");
        }
        for (i = 1; i <= count; i++)
            delete_it(&c,&l);
        head = nil;
        current = nil;
        last = nil;
        count = 0;
        if (n == 1)
     printf("database close\n");
    }

}

void output_record (void)
{

int n,
    i;
struct node *c,
            *l;

    if (head == nil)
 printf("no record\n");
    else  {
        n = 1;    /*指针初始化*/
        c = head;
        l = head->next;
        output_title();
        for (i = 1; i <= count; i++) {
            output_it(c,n);
            n = n + 1;
            c = l;
     l = c->next;
        }
    }

}

void del_record(void)
{

int condition_code;
int i,
    deleted_num;

/*   long_c,long_d  : (* UNDEFINED TYPE: longint *);

Error 4:  type expected:  ; */
        /* UNDEFINED TYPE: longint */
int long_c,long_d;
int del_num;
num_range1 del_number;
char del_name[11];
char del_sex;
struct date del_birthdate;
num_range2 del_experience;
num_range2 del_force;
num_range2 del_smartness;
struct node *c_bak,
            *l_bak;

    condition_code = condition_select("del condition:");    /*PROTECT*/
    c_bak = current;
    l_bak = last;
    switch (condition_code) {
 case 1:
     printf("\n");
     printf("record:");
     scanf("%d",&del_num);
     if ((del_num >= 1) && (del_num <= count)) {
  if (head != nil) {
                    current = nil;
      last = nil;    /*FIND NODE*/
                    for (i = 1; i <= del_num; i++) {
   if (i == 1) {
       current = head;
       last = current->next;
   }
   else  {
       current = last;
       last = current->next;
   }    /*IF*/
      }    /*FOR*/
      delete_it(¤t,&last);
      printf(" record %d delete\n",del_num);
  }
  else
      printf("no record like u need\n");
     }
     else
  printf("out record\n");
     break;    /*1*/
 case 2:
     printf("\n");
     printf("no:");
     scanf("%d",&del_number);
     if ((del_number >= 1) && (del_number <= 1000)) {
  if (head != nil) {
                    current = head;
                    last = current->next;
      deleted_num = 0;
                    for (i = 1; i <= count; i++) {
   if (current->number == del_number) {
                            delete_it(¤t,&last);
       deleted_num = deleted_num + 1;
   }
                        else  {
       current = last;
       last = current->next;
   }    /*IF*/
      }    /*FOR*/
      if (deleted_num != 0)
   printf(" record %d delete\n",deleted_num);
      else
      printf("no record like u need\n");
  }
  else
      printf("no record like u need\n");
     }
     else
  printf("out record\n");
     break;    /*2*/
 case 3:
     printf("\n");
     printf("name:");
     gets(del_name);
     if (head != nil) {
  current = head;
  last = current->next;
  deleted_num = 0;
  for (i = 1; i <= count; i++) {
      if (strcmp(current->name,del_name) == 0) {
   delete_it(¤t,&last);
   deleted_num = deleted_num + 1;
      }
      else  {
   current = last;
   last = current->next;
      }    /*IF*/
  }    /*FOR*/
  if (deleted_num != 0)
      printf(" record %d delete\n",deleted_num);
  else
      printf("no record like u need\n");
     }
     else
  printf("out record\n");
     break;
 case 4:
            printf("\n");
     printf("sex:");
     scanf("%c",&del_sex);
     if (head != nil) {
  current = head;
  last = current->next;
  deleted_num = 0;
                for (i = 1; i <= count; i++) {
                    if ((current->sex == del_sex)) {
                        delete_it(¤t,&last);
                        deleted_num = deleted_num + 1;
                    }
      else  {
   current = last;
   last = current->next;
      }    /*IF*/
  }    /*FOR*/
  if (deleted_num != 0)
      printf(" record %d delete\n",deleted_num);
  else
      printf("no record like u need\n");
     }
     else
  printf("out record\n");
     break;
 case 5:
     printf("\n");
     printf("birthday:");
     scanf("%d%d%d",&del_birthdate.da_year,&del_birthdate.da_mon,
      &del_birthdate.da_day);
     if (head != nil) {
  current = head;
  last = current->next;
  de leted_num = 0;
  long_d = del_birthdate.da_year;
  long_d = long_d * 100;
  long_d = long_d + del_birthdate.da_mon;
  long_d = long_d * 100;
  long_d = long_d + del_birthdate.da_day;
  for (i = 1; i <= count; i++) {
      long_c = current->birthdate.da_year;
      long_c = long_c * 100;
      long_c = long_c + current->birthdate.da_mon;
      long_c = long_c * 100;
      long_c = long_c + current->birthdate.da_day;
      if ((long_c == long_d)) {
   delete_it(¤t,&last);
   deleted_num = deleted_num + 1;
      }
      else  {
   current = last;
   last = current->next;
      }
  }    /*FOR*/
  if (deleted_num != 0)
      printf(" record %d delete\n",deleted_num);
  else
      printf("no record like u need\n");
     }
     else
  printf("out record\n");
     break;
        case 6:
            printf("\n");
     printf("experience:");
     scanf("%d",&del_experience);
     if (head != nil) {
  current = head;
  last = current->next;
  deleted_num = 0;
  for (i = 1; i <= count; i++) {
      if ((current->experience == del_experience)) {
   delete_it(¤t,&last);
   deleted_num = deleted_num + 1;
                    }
      else  {
   current = last;
   last = current->next;
      }    /*IF*/
  }    /*FOR*/
  if (deleted_num != 0)
      printf(" record %d delete\n",deleted_num);
  else
      printf("no record like u need\n");
     }
     else
  printf("out record\n");
     break;
 case 7:
     printf("\n");
     printf("force:");
     scanf("%d",&del_force);
            if (head != nil) {
  current = head;
                last = current->next;
  deleted_num = 0;
                for (i = 1; i <= count; i++) {
                    if ((current->force == del_force)) {
                        delete_it(¤t,&last);
   deleted_num = deleted_num + 1;
      }
      else  {
                        current = last;
   last = current->next;
      }    /*IF*/
  }    /*FOR*/
  if (deleted_num != 0)
      printf(" record %d delete\n",deleted_num);
  else
      printf("no record like u need\n");
     }
     else
  printf("out record\n");
     break;
 case 8:
     printf("\n");
     printf("smartness:");
     scanf("%d",&del_smartness);
            if (head != nil) {
  current = head;
                last = current->next;
  deleted_num = 0;
                for (i = 1; i <= count; i++) {
                    if ((current->smartness == del_smartness)) {
   delete_it(¤t,&last);
                        deleted_num = deleted_num + 1;
      }
      else  {
                        current = last;
   last = current->next;
      }    /*IF*/
  }    /*FOR*/
  if (deleted_num != 0)
      printf(" record %d delete\n",deleted_num);
  else
      printf("no record like u need\n");
     }
     else
  printf("out record\n");
     break;
 default:
     printf("delete error\n");
     break;
    }    /*CASE*/
    if (last != nil) {
 current = c_bak;
 last = l_bak;
    }

}

void find_record (void)
{

int condition_code;
int i,
    found_num;

/*   long_c,long_f  : (* UNDEFINED TYPE: longint *);

Error 4:  type expected:  ; */
 /* UNDEFINED TYPE: longint */
int long_c,long_f;
struct node *c,
            *l;
int find_num;
num_range1 find_number;
char find_name[11];
char find_sex;
struct date find_birthdate;
num_range2 find_experience;
num_range2 find_force;
num_range2 find_smartness;

    condition_code = condition_select("find condition:");
    switch (condition_code) {
 case 1:
     printf("\n");
     printf("record:");
     scanf("%d",&find_num);
     if ((find_num >= 1) && (find_num <= count)) {
                if (head != nil) {
                    c = nil;
                    l = nil;
                    found_num = 1;    /*FIND NODE*/
      for (i = 1; i <= find_num; i++) {
                        if (i == 1) {
                            c = head;
                            l = c->next;
                        }
                        else  {
                            c = l;
                            l = c->next;
                        }    /*IF*/
                    }    /*FOR*/
                    output_title();
      output_it(c,find_num);
      printf("find %d\n",found_num);
  }
  else
      printf("no record\n");
     }
            else
  printf("out record\n");
     break;
        case 2:
            printf("\n");
     printf("no:");
     scanf("%d",&find_number);
     if (head != nil) {
                c = head;
                l = c->next;
                found_num = 0;
                output_title();
                for (i = 1; i <= count; i++) {
                    if (c->number == find_number) {
   output_it(c,i);
                        found_num = found_num + 1;
   c = l;
                        c = c->next;
      }
      else  {
                        c = l;
                        l = c->next;
      }    /*IF*/
  }    /*FOR*/
  if (found_num != 0)
      printf("find %d\n",found_num);
  else
      printf("no record\n");
     }
     else
  printf("out record\n");
     break;
 case 3:
     printf("\n");
     printf("name:");
     gets(find_name);
     if (head != nil) {
  c = head;
  l = c->next;
                found_num = 0;
                output_title();
                for (i = 1; i <= count; i++) {
                    if (strcmp(c->name,find_name) == 0) {
   output_it(c,i);
                        found_num = found_num + 1;
   c = l;
   c = c->next;
      }
      else  {
   c = l;
   l = c->next;
      }    /*IF*/
  }    /*FOR*/
  if (found_num != 0)
      printf("find %d\n",found_num);
  else
      printf("no record\n");
     }
     else
  printf("out record\n");
     break;
 case 4:
     printf("\n");
     printf("sex:");
     scanf("%c",&find_sex);
            if (head != nil) {
                c = head;
  l = c->next;
                found_num = 0;
                output_title();
                for (i = 1; i <= count; i++) {
                    if (c->sex == find_sex) {
   output_it(c,i);
                        found_num = found_num + 1;
   c = l;
                        c = c->next;
      }
      else  {
   c = l;
   l = c->next;
      }    /*IF*/
  }    /*FOR*/
  if (found_num != 0)
      printf("find %d\n",found_num);
  else
      printf("no record\n");
     }
     else
  printf("out record\n");
     break;
 case 5:
     printf("\n");
     printf("birthday:");
     scanf("%d%d%d",&find_birthdate.da_year,&find_birthdate.da_mon,
      &find_birthdate.da_day);
     if (head != nil) {
  c = head;
  l = c->next;
  found_num = 0;
                output_title();
  long_f = find_birthdate.da_year;
                long_f = long_f * 100;
  long_f = long_f + find_birthdate.da_mon;
  long_f = long_f * 100;
  long_f = long_f + find_birthdate.da_day;
  for (i = 1; i <= count; i++) {
      long_c = c->birthdate.da_year;
                    long_c = long_c * 100;
      long_c = long_c + c->birthdate.da_mon;
                    long_c = long_c * 100;
      long_c = long_c + c->birthdate.da_day;
                    if (long_c == long_f) {
   output_it(c,i);
                        found_num = found_num + 1;
                        c = l;
   c = c->next;
      }
                    else  {
   c = l;
                        l = c->next;
                    }
                }    /*FOR*/
  if (found_num != 0)
      printf("find %d\n",found_num);
  else
      printf ("no record\n");
     }
     else
  printf("out record\n");
     break;
        case 6:
            printf("\n");
     printf("experience:");
     scanf("%d",&find_experience);
            if (head != nil) {
                c = head;
                l = c->next;
                found_num = 0;
  output_title();
  for (i = 1; i <= count; i++) {
                    if (c->experience == find_experience) {
                        output_it(c,i);
                        found_num = found_num + 1;
   c = l;
   l = c->next;
      }
      else  {
   c = l;
   l = c->next;
      }    /*IF*/
  }    /*FOR*/

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