FILE *f = fopen("a.txt", "r");
	fseek(f, 0, 2);
	int size = ftell(f);
	fseek(f, 0, 0);

	printf("%d\n", size);
	char *res = malloc((size+1)*sizeof(char));
	fread(res, sizeof(char), size, f);
	res[size-2] = '\0';
	printf("%s", res);

	char buff[100];
	fseek(f, 0, 0);
	while(!feof(f))
	{
		if (fgets(buff, 100, f) > 0)
			printf("%s", buff);
	}
	fclose(f);