Reading files by dividing into parts

[nothingelse]

HOW CAN READ THİS FİLES BY DİVİDİNG PARTS? İ WANT TO READ NUMBERS AND LOAD TO STRUCT BEFORE 'END' AND THEN AFTER HAT_ID LINES LOAD TO ANOTHER STRUCT.

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


struct musteri{
    float id[10];
    float x1[10];
    float x2[10];
    float x3[10];
    float x4[10];
    float x5[10];
    
}musteri;


struct hat{
    float id[30];
    float x1[30];
    float x2[30];
    float x3[30];
    float x4[30];
}hat;


int main() {


FILE *dosya;
dosya=fopen("test.txt","r");
int SIZE =256;
int i=0;
int j=0;
char buff[SIZE];
while ( fgets(buff,SIZE,dosya) ) {
  if ( buff[0] != 'E' ) {
    sscanf(buff," %f %f %f %f %f %f  ",&musteri.id[i],&musteri.x1[i],&musteri.x2[i],
             &musteri.x3[i],&musteri.x4[i],&musteri.x5[i]);
             i++;
  } 
  if (buff[0] != 'A') {
      sscanf(buff," %f %f %f %f %f   ",&hat.id[j],&hat.x1[j],&hat.x2[j],
             &hat.x3[j],&hat.x4[j]);
             j++;
  }
  
}