Deleting object in MVSD GUI c++

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So i have stuck in dead end and looking for some help. So i have 3 classes 2 of them contains another class object. So the problem is that i want if I want to start over and load data from files and process it. But problem starts then i need to clear up the old data. So as far as i think i should use destructor. But i'm not sure that calling one to clear one class data it would clear anothers too. So here is my MainForm header file:

public ref class MainForm : public System::Windows::Forms::Form
    {
    public:
        MainForm(void)
        {
            /* ----------- Constructor ----------- */
            InitializeComponent();
            info = new Firma;
            infoc = new Firma;
            /* -----------     End     ----------- */
        }

        /* ----------- Public ----------- */

        /* -----------  End   ----------- */


    protected:
        /* ----------- Protected ----------- */

        /* -----------    End    ----------- */
        ~MainForm()
        {
            if (components)
            {
                /* ----------- Destructor ----------- */
                delete components;
                delete info;
                delete infoc;
                /* -----------     End    ----------- */

            }
        }
    private: System::Windows::Forms::MenuStrip^  menuStrip1;
    protected:
    private: System::Windows::Forms::ToolStripMenuItem^  failasToolStripMenuItem;
    private: System::Windows::Forms::ToolStripMenuItem^  atidarytiFailaToolStripMenuItem;
    private: System::Windows::Forms::ToolStripMenuItem^  issaugotiFailaToolStripMenuItem;
    private: System::Windows::Forms::ToolStripSeparator^  toolStripSeparator1;
    private: System::Windows::Forms::ToolStripMenuItem^  baigtiToolStripMenuItem;
    private: System::Windows::Forms::OpenFileDialog^  openFileDialog1;
    private: System::Windows::Forms::SaveFileDialog^  saveFileDialog1;
    private: System::Windows::Forms::RichTextBox^  richTextBox1;

    private:
        /* ----------- Private ----------- */
        Firma *info, *infoc;

And here should initialize to clear data

private: System::Void naujasToolStripMenuItem_Click(System::Object^  sender, System::EventArgs^  e)
    {
        atidarytiFailaToolStripMenuItem->Enabled = true;
        richTextBox2->Text = "Failu nera";
        info
    }

Here is the info of classes:

#pragma once

#include "Taksi.h"
#include <string>
#include <sstream>
#include <iomanip>

class Firma
{
public:
    static const int Cd = 5;
private:
    Taksi *Fi;
    int n;
    int nmax;
    void KeistiMasyvoDydi(int kiek);
public:
    Firma(int nmx = 0);
    ~Firma();
    void DetiTaksi(Taksi & taks);
    Taksi ImtiTaksi(int ind) { return Fi[ind]; }
    int ImtiN() { return n; }
    void Eksplot(string & mar, int & rid);
    string Spalva();
    void Check();
};

Methods:

#include "Firma.h"

#include <string>
#include <sstream>
#include <iomanip>
#include <iostream>

using namespace std;

Firma::Firma(int nmx) : Fi(nullptr), n(0), nmax(nmx)
{
    if (nmax > 0)
    {
        Fi = new Taksi[nmax];
    }
}

Firma::~Firma()
{
    if (Fi)
    {
        delete[] Fi;
        n = 0;
    }
}

void Firma::KeistiMasyvoDydi(int kiek)
{
    if (kiek > nmax)
    {
        Taksi *Fnaujas = new Taksi[kiek];
        for (int i = 0; i < n; i++)
        {
            Fnaujas[i] = Fi[i];
        }
        delete[] Fi;
        Fi = Fnaujas;
        nmax = kiek;
    }
    else
    {
        if (kiek < nmax)
        {
            Taksi *Fnaujas = new Taksi[kiek];
            for (int i = 0; i < kiek; i++)
            {
                Fnaujas[i] = Fi[i];
            }
            delete[] Fi;
            Fi = Fnaujas;
            n = nmax = kiek;
        }
    }
}

void Firma::DetiTaksi(Taksi & taks)
{
    if (n == nmax)
    {
        KeistiMasyvoDydi(n + Cd);
    }
    Fi[n] = taks;
    n++;
}

void Firma::Check()
{
    cout << n << endl;
}

void Firma::Eksplot(string & mar, int & rid)
{
    mar = "";
    rid = 0;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < Fi[i].ImtiN(); j++)
        {
            if (Fi[i].ImtiTaksista(j).ImtiRid() > rid)
            {
                rid = Fi[i].ImtiTaksista(j).ImtiRid();
                mar = Fi[i].ImtiTaksista(j).ImtiMar();
            }
        }
    }
}

string Firma::Spalva()
{
    stringstream eil;
    bool yra;
    for (int i = 0; i < n; i++)
    {
        for (int k = 0; k < Fi[i].ImtiN(); k++)
        {
            yra = false;
            for (int j = 0; j < n; j++)
            {
                for (int l = 0; l < Fi[j].ImtiN() && j != i; l++)
                {
                    if (Fi[i].ImtiTaksista(k).ImtiSpa() == Fi[j].ImtiTaksista(l).ImtiSpa())
                    {
                        yra = true;
                    }
                }
            }
            if (yra == false)
            {
                eil << left << setw(12) << Fi[i].ImtiP() << " - " << right << setw(14) << Fi[i].ImtiTaksista(k).ImtiSpa() << endl;
            }
        }
    }
    return eil.str();
}

And here's another one and strange here that i cant use destructor here or it needs to be a some sort of specific one or something

#pragma once

#include <string>
#include <sstream>
#include <iomanip>
#include "Taksistas.h"

class Taksi
{
public:
    static const int Cd = 5;
private:
    Taksistas *Ta;
    int n;
    int nmax;
    string pav;
    void KeistiMasyvoDydi(int kiek);
public:
    Taksi(int nmx = 0);
   ~Taksi();
   void DetiTaksista(Taksistas & taks, string pv);
   Taksistas ImtiTaksista(int ind) { return Ta[ind]; }
   int    ImtiN() { return   n; }
   string ImtiP() { return pav; }
   string Spauzdinti();
}; 

Methods:

#include "Taksi.h"

#include <string>
#include <sstream>
#include <iomanip>
#include <iostream>

using namespace std;

Taksi::Taksi(int nmx) : Ta(nullptr), n(0), nmax(nmx), pav("")
{
    if (nmax > 0)
    {
        Ta = new Taksistas[nmax];
    }
}

Taksi::~Taksi()
{
    if (Ta)
    {
        delete[] Ta;
        n = 0;
    }
}

void Taksi::KeistiMasyvoDydi(int kiek)
{
    if (kiek > nmax)
    {
        Taksistas *Tnaujas = new Taksistas[kiek];
        for (int i = 0; i < n; i++)
        {
            Tnaujas[i] = Ta[i];
        }
        delete[] Ta;
        Ta = Tnaujas;
        nmax = kiek;
    }
    else
    {
        if (kiek < nmax)
        {
            Taksistas *Tnaujas = new Taksistas[kiek];
            for (int i = 0; i < kiek; i++)
            {
                Tnaujas[i] = Ta[i];
            }
            delete[] Ta;
            Ta = Tnaujas;
            n = nmax = kiek;
        }
    }
}

void Taksi::DetiTaksista(Taksistas & taks, string pv)
{
    if (n == nmax)
    {
        KeistiMasyvoDydi(n + Cd);
    }
    Ta[n] = taks;
    pav = pv;
    n++;
}

string Taksi::Spauzdinti()
{
    stringstream eil;
    eil << "   " << pav << "\n\n";
    for (int i = 0; i < n; i++)
    {
        eil << Ta[i].Spauzdinti();
    }
    return eil.str();
}

And the last one which data the data:

#include <string>
#include <sstream>
#include <iomanip>

using namespace std;

class Taksistas
{
private:
    string pav; // Vairuotojo pavarde.
    string mar; // Masinos marke.
    string num; // Masinos valstybinis numeris.
    string dat; // Masinos pagaminimo metai.
    string spa; // Masinos spalva.
    int    rid; // Rida (tuks. km) per metus.
public:
    Taksistas() : pav(""), mar(""), num(""), dat(""), spa(""), rid(0) {}
    Taksistas(string pv, string ma, string nu, string da, string sp, int ri);

    void DetiTaks(string pav, string mar, string num, string dat, string spa, int rid);

    string ImtiPav() { return pav; }
    string ImtiMar() { return mar; }
    string ImtiNum() { return dat; }
    string ImtiDat() { return dat; }
    string ImtiSpa() { return spa; }
    int    ImtiRid() { return rid; }

    string Spauzdinti();
};

So as far as i understand that i dont need to clean all data i just need to reset objects length to 0 and then new data is filled it would be overwrite. Not sure if it would be free up to use for other programs and overwrite.

asked 37 secs ago

user2320390

1

Deleting object in MVSD GUI c++