LinuxC语言读取文件，分割字符串，存入链表，放入另一个文件

//file_op.c

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
struct info{
  int id;
  char name[];
  char sex[];
  char col[];
  char sub[];
  char marks[];
  struct info * prev;
  struct info * next;
};
typedef struct info *st;
static st head = NULL;//链表头指针
#define PRINT_ST(str) \
  "info:id=%d; name=%s; sex=%s;col=%s; sub=%s; marks=%s\n",\
  str->id,str->name, str->sex,str->col, str->sub, str->marks
int temp = ;
int break_up(char *buffer);//分割字符串函数
int put_in(char* str[]);//放入结构体
int print_st(st str);//输出结构体，测试用
char * char_filter( char *str);//去掉行末回车符
int insert_list(st p);//插入链表
int main(void)
{
  FILE *stream;
  char msg[];
  char backup[];
  st p1, p2;
  /* open a file for update */
  stream = fopen("file.txt","r");
  /* seek to the start of the file */
  fseek(stream, , SEEK_SET);//指针指向文件头部
  /*备份第一行内容*/
  fgets(msg, , stream) != NULL;
  strcpy(backup, msg);
  /* 从第二行开始去数据 */
  while( fgets(msg, , stream) != NULL)
  {
    printf("%s",msg);
    break_up(msg);
    memset(msg, , sizeof(msg));
  }
  /*先读取一行内容，测试用
     fgets(msg, 100, stream) != NULL;
     printf("%s",msg);
     break_up(msg);
     */
  fclose(stream);
   /*正序输出链表，测试用*/
  p1 = head;
  puts("\n");
  while( p1 != NULL)
  {
    print_st(p1);
    p1 = p1->next;
  }
  /*倒序输出链表，测试用*/
  p1 = head;
  puts("\n");
  while(p1 != NULL)
  {
    p2 = p1;
    p1 = p1->next;
  }
  while(p2 != NULL)
  {
    print_st(p2);
    p2 = p2->prev;
  } 

  /*下面新建文件，倒叙输出到一个新文件new.txt里面*/
  stream = fopen("new.txt","w+");
  if(fputs(backup, stream) < )
    {
      perror("fputs error:");
    }
  p1 = head;
  while(p1 != NULL)
  {
    p2 = p1;
    p1 = p1->next;
  }
  while(p2 != NULL)
  {
    snprintf(msg, sizeof(msg), PRINT_ST(p2));
    printf("test_char:%s\n",msg);
    fputs(msg, stream);
    p2 = p2->prev;
  } 

  fclose(stream);   

  /*释放链表*/
  p1 = head->next;
  while (p1 != NULL)
  {
    p2 = p1;
    p1 = p1->next;
    free(p2);
  }
  free(head);
  head = NULL;
  return ;
}
/*分割字符串*/
int break_up(char *buffer)
{
  int i = , j = ;
  char *p[]= {NULL};
  char *buf=buffer;
  char *outer_ptr=NULL;
  char *inner_ptr=NULL;
  while((p[i]=strtok_r(buf,";",&outer_ptr))!=NULL)
  {
    i++;
    buf=NULL;
  }
//  printf("Here we have %d strings\n",i);//测试用
  for(j= ; j<i; j++)
  {
    printf("%s\n",p[j]);//输出分割字符串，测试用
  }
  put_in(p);
  return ;
}
/*放入结构体*/
int put_in(char* str[])
{
  st st1 = (st)malloc(sizeof(struct info));
  st1->id = atoi(str[]);
  strcpy(st1->name, str[]);
  strcpy(st1->sex, str[]);
  strcpy(st1->col, str[]);
  strcpy(st1->sub, str[]);
  str[] = char_filter(str[]);
  strcpy(st1->marks, str[] );
  st1->next = NULL;
  st1->prev = NULL;
  print_st(st1);
  if(temp == )
  {
    head = st1;
    temp++;
    return ;
  }
  insert_list(st1);
  return ;
}
int print_st(st str)//
{
/*  printf("info:id=%d; name=%s; sex=%s; col=%s; sub=%s; marks=%s\n",
      str->id,str->name, str->sex, str->col, str->sub, str->marks);
      */
  printf(PRINT_ST(str));
}
char *char_filter( char *str)
{
  int i = strlen(str);
  *(str + i - ) = '\0';
  return str;
}
int insert_list(st p)
{ 

  st q = head;
  while( q->next != NULL)
  {
    q = q->next;
  }
  q->next = p;
  p->prev = q;
  return ;
} 

===================================

file.txt 内容

ID;NAME;SEX;COLLEGE;SUBJECT;REMARKS 
1;jean;male;electron;communicate;no marks 
2;luce;female;legal;legal;thanks 
3;devide;male;building;build;remarks 
4;liulian;female;business;business;arm

===============================================

程序输出：

1;jean;male;electron;communicate;no marks 
1 
jean 
male 
electron 
communicate 
no marks

info:id=1; name=jean; sex=male;col=electron; sub=communicate; marks=no marks 
2;luce;female;legal;legal;thanks 
2 
luce 
female 
legal 
legal 
thanks

info:id=2; name=luce; sex=female;col=legal; sub=legal; marks=thanks 
3;devide;male;building;build;remarks 
3 
devide 
male 
building 
build 
remarks

info:id=3; name=devide; sex=male;col=building; sub=build; marks=remarks 
4;liulian;female;business;business;arm 
4 
liulian 
female 
business 
business 
arm

info:id=4; name=liulian; sex=female;col=business; sub=business; marks=arm

info:id=1; name=jean; sex=male;col=electron; sub=communicate; marks=no marks 
info:id=2; name=luce; sex=female;col=legal; sub=legal; marks=thanks 
info:id=3; name=devide; sex=male;col=building; sub=build; marks=remarks 
info:id=4; name=liulian; sex=female;col=business; sub=business; marks=arm

info:id=4; name=liulian; sex=female;col=business; sub=business; marks=arm 
info:id=3; name=devide; sex=male;col=building; sub=build; marks=remarks 
info:id=2; name=luce; sex=female;col=legal; sub=legal; marks=thanks 
info:id=1; name=jean; sex=male;col=electron; sub=communicate; marks=no marks 
test_char:info:id=4; name=liulian; sex=female;col=business; sub=business; marks=arm

test_char:info:id=3; name=devide; sex=male;col=building; sub=build; marks=remarks

test_char:info:id=2; name=luce; sex=female;col=legal; sub=legal; marks=thanks

test_char:info:id=1; name=jean; sex=male;col=electron; sub=communicate; marks=no marks