File입출력과 double Linked List 를 사용해서 Buffer에 데이터 저장

dblab_lru.txt

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/////////////////////////////////////////////////////////////////////////struct declar
typedef struct
{
int key;
}list;

typedef struct node *node_pointer;
typedef struct node{
struct node *llink;
list item;
struct node *rlink;
} node;

///////////////////////////////////////////////////////////////////////////Global Variable

int a[100000000];
int buffer[100000000];
char b[8];
int count;
int result_s;

////////////////////////////////////////////////////////////////////////Reading dblab_lru.txt
void readingfile(){
 
  FILE *fp;
//  char temp;

  printf("Reading dblab_lru.txt file... \n");
 
  fp = fopen("dblab_lru.txt", "r");

  count=0;
  while( !feof(fp) )
  {
    fscanf(fp,"%d",&a[count]);
 count++;
 
  }

  fclose(fp);
  printf("Reading Complete \n");

}
///////////////////////////////////////////////////////////////////////Node Insert
void dinsert(node_pointer node, node_pointer newnode)
{
newnode ->llink = node;
newnode ->rlink = node ->rlink;
node ->rlink ->llink = newnode;
node ->rlink = newnode;
}
/////////////////////////////////////////////////////////////////////////Node Delete
void ddelete(node_pointer node, node_pointer deleted)
{
if(node == deleted)
{
printf("Deletion of head node not permitted. \n");
}
else
{
deleted ->llink ->rlink = deleted ->rlink;
deleted ->rlink ->llink = deleted ->llink;
free(deleted);
}
}
/////////////////////////////////////////////////////////////////////////Node Print
void Print(node_pointer ptr) {

node_pointer ptr2;
ptr2 = ptr->rlink;
for(ptr2; ptr2 != ptr; ptr2=ptr2->rlink)
printf("%d\n", ptr2->item.key);

}
//////////////////////////////////////////////////////////////////////////Search Function
/*
int search(node_pointer ptr, int next_i){
{
 node_pointer ptr3;
 ptr3=ptr->rlink;
 while(ptr3->item.key != next_i && ptr3 != NULL) 
  ptr3=ptr3->rlink;
 return *ptr3;

}*/
//////////////////////////////////////////////////////////////////////////Main Function

int main(){

 node_pointer ptr;
 ptr = (node_pointer)malloc(sizeof(node));
 ptr ->llink = ptr;
 ptr ->rlink = ptr;

 node_pointer newnode;
 
 int si;
 int imsi;

    printf("Input Buffer Size [Size Limit : 7000] : ");
    scanf("%d", &si);

    printf("Buffer Size is %d !\n", si);

 readingfile();

   
    for(int c=0 ; c < si ;c++){
  newnode = (node_pointer)malloc(sizeof(node));
  imsi = (int)a[c];
  newnode->item.key = imsi;
  dinsert(ptr, newnode);
 }
 
    printf("In Buffer : %d\n",si);
 printf("ITEM : ");

      Print(ptr);
      printf("\n");

// ddelete(ptr, ptr->rlink);
}