员工信息管理系统c代码

#include <stdio.h>
#include <stdlib.h>
#include <string.h> 
#include <windows.h>
typedef struct work
{
long  num;
char name[21];
char sex[4];
    char location[10];
char birthday[10];
char education[10];
char address[51];
char  phone[14];
struct work *next;
}work_list;
struct body
{
long  num;
char name[21];
char sex[4];
    char location[10];
char birthday[10];
char education[10];
char address[51];
char  phone[14];
};
FILE *fp;
work_list *head,*tail;
work_list *load(char filename[20]) /*从文件中读取数据生成通讯录链表，若文件不存在生成空链表*/

{  
work_list *person,*head; 
   struct body s; 
   head=(work_list *)malloc(sizeof(work_list));  /*把地址赋给一个指向结构体型的指针变量*/
   tail=head=NULL; 
   if((fp=fopen(filename,"rb"))==NULL)                      
      return head; 
   else 
     if(!feof(fp)) 
        if(fread(&s,sizeof(struct body),1,fp)==1) 
{
person=(work_list *)malloc(sizeof(work_list)); /* 连入链表第一个节点 */ 
            person->num=s.num;
strcpy(person->name,s.name); 
strcpy(person->sex,s.sex);
strcpy(person->location,s.location);
strcpy(person->birthday,s.birthday);
strcpy(person->education,s.education); 
            strcpy(person->address,s.address); 
            strcpy(person->phone,s.phone); 
            head=tail=person; 
            person->next=NULL; 
            while(!feof(fp)) /* 连入链表其余节点 */ 
{ 
if(fread(&s,sizeof(struct body),1,fp)==1) 
{ 
person=(work_list *)malloc(sizeof(work_list));
                    person->num=s.num;
        strcpy(person->name,s.name); 
strcpy(person->sex,s.sex);