File compare program

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C

I got two code file.I wanna compare two text file and I wanna show difference in text.that will do linked list.Firstly,I integrated the text with linked list.I chose the boyer moore algorithm to compare string.But I don't know merge two code file.I sent the codes.thank you very much for helping. :)

for linked list

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

struct List
{
       char *val;
       struct List *next;
      
       };
       typedef struct List Node;
      
       Node *curr,*head;
      
       void ekle(char *deger)
       {
            
            curr->val = deger;
           
            Node *tmp = (Node*)malloc(sizeof(Node));
           
            tmp->next = NULL;
            
            curr->next = tmp;
            
            printf("%s",curr->val);printf(" ");
        
            curr = curr -> next;
            }
            
            void satiriAyir(char *satir)
            {
                 char *kelime = NULL;
                 kelime = strtok (satir," ");
                 while(kelime !=NULL)
                 {
                              ekle(kelime);
                              kelime = strtok (NULL, " ");
                              }
                              }
                              
                              int main()
                              {
                                  setlocale(LC_ALL,"Turkish");
                                
                                  curr = (Node *)malloc(sizeof(Node));
                                  curr ->next=NULL;
                                  head = curr;
                                  FILE *fp = fopen("C:\\Users\\orçun\\Desktop\\metin1.txt","r");
                                  char satir[1000];
                                  while (fgets( satir,sizeof(satir),fp ))
                                  satiriAyir(satir);
                                  fclose(fp);
                                  getch();
                                  return 0;
                                  }

and for boyer moore algorithm:

#include <stdio.h>
#include <string.h>
#include <conio.h>
#include <windows.h>
#include<process.h>
#include<stdlib.h>


int main()
{
    char string[1000], substring[1000];
    int strvalue[256], i, j, diff = 0, count = 0;

    printf("Input string: ");
    gets(string);
    printf("Input substring: ");
    gets(substring);
    for (i = 0; i < 256; i++)
    {
        strvalue[i] = -1;
    }
    for (i = strlen(substring) - 1; i >= 0 ; i--)
    {
        if (strvalue[substring[i]] == -1)
            strvalue[substring[i]] = i;
    }
    for (i = 0; i < 256; i++)
    {
        if (strvalue[substring[i]] == -1)
            strvalue[substring[i]] = strlen(substring);
    }
    i = strlen(substring) - 1;
    while (true)
    {
        for (j = strlen(substring) - 1; j >= 0 ; j--)
        {
            if (substring[j] == string[i - diff])
            {
                count++;
                diff++;
            }
            else
                break;
            if (count == strlen(substring))
            {
                printf("%d", i - diff + 2);
                getch();
                exit(0);
            }
        }
        diff = strlen(substring) - strvalue[string[i - diff]] - 1 - count;
        if (diff > 0)
        {
            i = i + diff;
            diff = 0;
            count = 0;
        }
        else
            i++;
        if (i > strlen(string) + strlen(substring) + 2)
           getch();
           exit(0);

    }
}