Lab 8 final version

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

int string_length(char *s);

void main()
{
    setloclale(LC_ALL, "RUSSIAN");
    char s[256];
    char max_string[256];
    int string_counter;
    int max_length;
    int current_length;
    int i;
    int flag_enter; //1 - кончается на \n, 0 - не кончается на \n;
    FILE *in;
    in = fopen("C:\\test\\file.txt", "rt");
    if (in != NULL)
    {
        string_counter = 0;
        max_length = -1;
        while (fgets(s, 256, in) != NULL)
        {
            flag_enter = 0;
            string_counter++;
            current_length = string_length(s);
            if (current_length > max_length)
            {
                max_length = current_length;
                for (i = 0; i <= max_length; i++)
                {
                    if (s[i] != '\n') { //символ '\n' запишем как '\0'
                        max_string[i] = s[i];
                    }
                    else {
                        max_string[i] = '\0';
                        flag_enter = 1;
                    }
                }

            }
            else
            {
                for (i = 0; i <= current_length; i++)
                {
                    if (s[i] == '\n')
                    {
                        flag_enter = 1;
                    }
                }
            }
        }
        if (feof(in) == 0)
        {
            printf("An error occured.");
        }
        else if ((string_counter == 0))
        {
            printf("This file is empty");
        }
        else
        {
            if (flag_enter == 1) //Если последняя строка пустая
                string_counter++;
            printf("String count = %d\n", string_counter);
            printf("The longest string: \n\"%s\"", max_string);
            printf("\nLength of the longest string = %d\n", max_length);
        }
        fclose(in);
    }
    else
    {
        printf("Cannot open file.");
    }
}
int string_length(char *s)
{
    int i = 0; //Длина строки
    char symb = *(s);
    while ((symb != '\n') && (symb != '\0'))
    {
        i++;
        symb = *(s + i);
    }
    return i;
}