How do I sort a file in C

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
	struct details{
	char title[256] ;
	char platform [256];
	char score[256];
	char release_year[256];
}record[20000],temp;
int main ()
{
	int i =0,j=0,val=0;
	
  FILE * myfile;
  char a[512];
  
  myfile=fopen ("ign.txt","r");
 FILE *newFile = fopen("ign_new.txt", "w");

  if (myfile==NULL){
   perror (" empty file ");}
  else
  {
     	while ( fgets ( a, sizeof a, myfile ) != NULL ){
      
	  	switch(i) {
     

	   
   case 0  :
   	    strcpy(record[j].title,a);
    
        i++;
        break; 
	
	 case 1  :
	    
		
       strcpy(record[j].platform,a);
    
	   i++;
       break; 
	
	 case 2  :
   	     	   
         	     
        strcpy(record[j].score,a);
         
        i++;
        break; 
	
	 case 3  :
	 	strcpy(record[j].release_year,a);
       
	    i++;
        break; 
	
	 
    case 4:
	    i=0;
	    strcpy(record[j].title,a);
	    j++;
	    break;
	     
       
      
	  
	  
	  
		

}

	
	    
      
    }
    
     printf("%s",record[1].release_year);
     

    int n = j;
     
    
	for(i=1;i<n;i++){
		int flag=0;
		
		for( j=0;j<n-i;j++){
			if(atoi(record[j].score)<atoi(record[j+1].score)){
				strcpy(temp.title,record[j].title);
				strcpy(record[j].title,record[j+1].title);
				strcpy(record[j+1].title,temp.title);
				strcpy(temp.release_year,record[j].release_year);
				strcpy(record[j].release_year,record[j+1].release_year);
				strcpy(record[j+1].release_year,temp.release_year);
				strcpy(temp.platform,record[j].platform);
				strcpy(record[j].platform,record[j+1].platform);
				strcpy(record[j+1].platform,temp.platform);
				strcpy(temp.score,record[j].score);
				strcpy(record[j].score,record[j+1].score);
				strcpy(record[j+1].score,temp.score);
				flag=1;
			}
			
		}
		if(flag==0)break;
	}
       
    
    
    
    
    
    
    

    
    
    
    printf("\n %s",record[1].release_year);
    fclose (myfile);
    
  }
  return 0;
}

/*my file contains 18000 entries and some of them are
title
platform
Score
release_year

140
PC
8
2013

300
Wireless
8
2007

1942
Game Boy Color
5
2000

1942
Wireless
5
2006
*/

What I have tried:

this is not storing the data of score column in record[j].score after sorting but before it is storing correctly

Tags: C, Sorting, FileIO