#include "stdafx.h"
#include "stdio.h"
#include <iostream>
#include <string>
#include <string.h>
#include <iomanip>
#include <io.h>
#include <Windows.h>
using namespace std;
#define _CRT_SECURE_NO_WARNINGS

char* sozdanie(char*, FILE*);
char* zapis(char*, FILE*);
char* read(char*, FILE*);
char* text(char*, char*,FILE*);
struct rasp
{
    int number;
    double otpr;
    char mesto[50];
    double prib;
}avtobus,*spisok;

int main()
{
    char txtfname[100];
    char filename[100];
    strcpy(filename, "lala");

    FILE *fl = NULL;

    /*bool bp = true;
    do
    {
        switch (menu())
        {
        case 1: cout << endl << "imya faila: "  << sozdanie(filename, fl) << endl << endl; break;
        case 2: cout << endl << "imya faila: "  << zapis(filename, fl) << endl << endl; break;
        case 3: cout << endl << "imya faila: "  << read(filename, fl) << endl << endl; break;
        case 4: cout << endl << "imya txtfaila: " << text(txtfname, filename, fl) << endl << endl; break;
        case 5: bp = false; break;
        default: cout << "Nepravilniy vibor."; break;
        }
    */} while (bp);
    return 0;
}

//меню
int menu()
{
    cout << "Vybirite: " << endl;
    cout << "1. Sozdat' binarnii fail" << endl;
    cout << "2. Zapisat dannie v fail" << endl;
    cout << "3. Otkrit fail, prochitat, vivesti resultat" << endl;
    cout << "4. Vivesti v txt fail" << endl;
    cout << "5. Exit" << endl;
    int i;
    cin >> i;
    return i;
}

char* sozdanie(char* filename, FILE* fl)
{
    cout << "Vvedite nazvanie faila: ";
    gets_s(filename, 100);
    strcat(filename, ".txt");//соединяет две строки
    fl = fopen(filename, "w");
    if ((fl = fopen(filename, "wb")) == NULL)
    {
        cout << "Oshibka pri sozdanii" << endl;
        filename = "oshibka";
    }
    fclose(fl);
    return filename;
}

char* zapis(char* filename, FILE* fl)
{
    if ((fl = fopen(filename, "ab")) == NULL)
    {
        return "oshibka pri otkritii";
    }
    char ch;
    do
    {
        cout << "Vvedite nomer poezda: "; cin >> avtobus.number;
        cout << "Vvedite vremya otpravleniya: "; cin >> avtobus.otpr;
        rewind(stdin);
        cout << "Vvedite punkt naznacheniya: "; gets_s(avtobus.mesto, 19);
        cout << "Vvedite vremya pribytiya: "; cin >> avtobus.prib;
        fwrite(&avtobus, sizeof(rasp), 1, fl);
        cout << endl << "Prodolzhit vvod? y/n: ";
        cin >> ch;
        cout << endl;
    } while (ch != 'n');
    fclose(fl);
    return filename;
}
char* read(char* filename, FILE* fl)
{
    if ((fl = fopen(filename, "rb")) == NULL)
    {
        return "Oshibka pri otkritii";
    }
    //int n = _filelength(_fileno(fl)) / sizeof(rasp);
    //for (int i = 0; i < n; i++)
    {
        fread(&avtobus, sizeof(rasp), 1, fl);//чтение из файла
        rewind(stdin);
        printf("%d, %f, %s, %f\n", avtobus.number, avtobus.otpr, avtobus.mesto, avtobus.prib);
    }
    fclose(fl);
    return filename;
}

char* text(char* txtfname, char* filename, FILE* fl)
{

    FILE *ft;
    cout << "Vvedite textfile name: ";
    rewind(stdin);
    gets_s(txtfname, 29);
    if ((ft = fopen(txtfname, "w")) == NULL)
        return "Oshibka pri sozdanii textovogo faila.";
    if ((fl = fopen(filename, "rb")) == NULL)
    {
        remove(txtfname);
        return "Oshibka pri otkritii.";
    }
    //int n = _filelength(_fileno(fl)) / sizeof(rasp);
    //for (int i = 0; i < n; i++)
    {
        fread(&avtobus, sizeof(rasp), 1, fl);
        fprintf(ft, "%d\n %f\n %s\n %f\n\n", avtobus.number, avtobus.otpr, avtobus.mesto, avtobus.prib);
    }
    fclose(fl);
    fclose(ft);
    return txtfname;
}