Bug

#define _CRT_SECURE_NO_WARNINGS
#include <cstdlib>
#include <stdio.h>

using namespace std;

int* File1D(const char file[50]);
int* make1D(int size);
void secureFile(FILE* f);
void fel1();

int main()
{
	fel1();
}

void fel1() {
	int* arr=File1D("be.txt");
	for (int i = 0; i < 5; i++) {
		printf("%d\n", arr[i]);
	}
}

int* File1D(const char file[50])
{
	FILE* f = fopen(file, "rt");
	secureFile(f);

	int counter=0;

	while (fscanf(f,"%d")!=EOF) {
		counter++;
	}

	int* arr = make1D(counter);

	int i = 0;

	while (fscanf(f, "%d",arr[i]) != EOF) {
		i++;
	}

	return arr;
}

int* make1D(int size)
{
	int* arr = (int*)malloc(size * sizeof(int));
	return arr;
}

void secureFile(FILE* f)
{
	if (!f)
	{
		puts("Nem sikerult megnyitni az allomanyt.");
		exit(43);
	}
}