Invalid floating point operation

#include <string.h>
#include <stdio.h>
 
#include <vcl.h>
 
#pragma hdrstop
#include "Explorer_C.h"
 
#pragma package(smart_init)
#pragma resource "*.dfm"
 
TExplorer *Explorer;
 
//concatenation
String timeConcatenate(char str1[], char symbol, char str2[], char zero = NULL) {
        char* p1 = str1;
        char* p2 = str2;
 
        int index = 0;
        for (;*p1; p1++, index++) {}
        str1[index] = symbol; index++;
        if (zero != NULL) {str1[index] = zero; index++;}
        for (;*p2; p2++, index++) str1[index] = *p2;
 
        str1[index] = '\0';
 
        return str1;
}
 
//animation: variable (public)
TPanel* panelObjVT = new TPanel(Explorer);
 
//animation: function
void panelAnimation(TPanel *objVT) {
        panelObjVT = objVT;
        Explorer->timer_animation->Enabled = true;
}
 
//video timer: variables (public)
int totalTime = 0;
int seconds = 0;
int minutes = 0;
 
//point class
class _Point {
public:
        _Point(String path, String title, int textSize = 38) : m_title(title), m_path(path), m_textSize(textSize) {}
 
        static void Show(_Point obj) {
                Explorer->media_player->FileName = obj.m_path;
                Explorer->media_player->Open();
 
                Explorer->title->Caption = obj.m_title;
                Explorer->title->Font->Size = obj.m_textSize;
 
                int local_seconds = static_cast<int>(Explorer->media_player->Length/1000);
                int local_minutes = static_cast<int>(local_seconds/60);
 
                char buffer1[1024] = {'\0'};
                char buffer2[1024] = {'\0'};
 
                itoa(local_minutes,buffer1,10);
                itoa(local_seconds-local_minutes*60,buffer2,10);
 
                Explorer->l_time_total->Caption = timeConcatenate(buffer1, ':', buffer2, local_seconds-local_minutes*60 < 10 ? '0' : NULL);
 
                totalTime = local_seconds;
 
                panelAnimation(Explorer->show_screen_panel);
        }
 
public:
        String m_title,
        m_path;
 
        int m_textSize;
};
 
//point class array
_Point data[9] = {
        _Point("point_videos\\mountain.wmv", "\"Белая гора\""),
        _Point("point_videos\\mass_grave.wmv", "Памятник воинам-односельчанам", 25),
        _Point("point_videos\\pilots.wmv", "Место гибели пилотов"),
        _Point("point_videos\\village.wmv", "Село"),
        _Point("point_videos\\Zavet.wmv", "Братская могила №190", 36),
        _Point("point_videos\\grave_of_dead_villagers.wmv", "Могила погибших односельчан", 28),
        _Point("point_videos\\school.wmv", "Школа"),
        _Point("point_videos\\spring.wmv", "Источник"),
        _Point("point_videos\\church.wmv", "Храм")
};
 
//---------
__fastcall TExplorer::TExplorer(TComponent* Owner) : TForm(Owner) {}
 
void __fastcall TExplorer::FormCreate(TObject *Sender)
{
        Explorer->DoubleBuffered = true;
        Explorer->map_panel->DoubleBuffered = true;
        Explorer->map_panel_support->DoubleBuffered = true;
        Explorer->show_screen_panel->DoubleBuffered = true;
        Explorer->home_screen_panel->DoubleBuffered = true;
        Explorer->map_label_panel->DoubleBuffered = true;
 
        media_player->Display = display;
}
//---------
 
//home_screen buttons
void __fastcall TExplorer::button_gtm_nMouseMove(TObject *Sender,
      TShiftState Shift, int X, int Y)
{
        button_gtm_co->Visible = true;
        button_gtm_n->Visible = false;
}
 
void __fastcall TExplorer::home_screenMouseMove(TObject *Sender,
      TShiftState Shift, int X, int Y)
{
        button_gtm_n->Visible = true;
        button_e_n->Visible = true;
        button_gtm_co->Visible = false;
        button_e_co->Visible = false;
}
 
void __fastcall TExplorer::button_gtm_coClick(TObject *Sender)
{panelAnimation(Explorer->map_panel);}
 
void __fastcall TExplorer::button_e_nMouseMove(TObject *Sender,
      TShiftState Shift, int X, int Y)
{
        button_e_co->Visible = true;
        button_e_n->Visible = false;
}
 
void __fastcall TExplorer::button_e_coClick(TObject *Sender)
{Explorer->Close();}
 
//back button
void __fastcall TExplorer::button_bClick(TObject *Sender)
{
        if (!show_screen_panel->Left) {
                media_player->Stop();
                media_player->FileName = "";
                title->Caption = "";
                l_time_present->Caption = "0:00";
                l_time_total->Caption = "0:00";
                minutes = 0;
                seconds = 0;
                timer_video->Enabled = false;
                button_display_play->Visible = true;
                button_display_stop->Visible = false;
                map_panel->Visible = true;
 
                show_screen_panel->Left = 809;
        } else map_panel->Left = 809;
}
 
//points
void __fastcall TExplorer::p_massGraveClick(TObject *Sender)
{_Point::Show(data[1]);}
 
void __fastcall TExplorer::p_monumentClick(TObject *Sender)
{_Point::Show(data[5]);}
 
void __fastcall TExplorer::p_whiteMountainClick(TObject *Sender)
{_Point::Show(data[0]);}
 
void __fastcall TExplorer::p_villageClick(TObject *Sender)
{_Point::Show(data[3]);}
 
void __fastcall TExplorer::p_pilotsClick(TObject *Sender)
{_Point::Show(data[2]);}
 
void __fastcall TExplorer::p_springClick(TObject *Sender)
{_Point::Show(data[7]);}
 
void __fastcall TExplorer::p_massGrave190Click(TObject *Sender)
{_Point::Show(data[4]);}
 
void __fastcall TExplorer::p_schoolClick(TObject *Sender)
{_Point::Show(data[6]);}
 
void __fastcall TExplorer::p_churchClick(TObject *Sender)
{_Point::Show(data[8]);}
 
//display button
bool play = false;
 
void __fastcall TExplorer::displayClick(TObject *Sender)
{
        if (!play) {
                media_player->Play();
                button_display_play->Visible = false;
                button_display_stop->Visible = true;
                timer_video->Enabled = true;
        } else {
                media_player->Stop();
                button_display_stop->Visible = false;
                button_display_play->Visible = true;
                timer_video->Enabled = false;
        }
 
        play = !play;
}
 
//map movement
bool lbMouseDown = false;
int startX, startY;
 
void __fastcall TExplorer::mapMouseDown(TObject *Sender,
      TMouseButton Button, TShiftState Shift, int X, int Y)
{
        lbMouseDown = true;
 
        startX = X;
        startY = Y;
}
 
void __fastcall TExplorer::mapMouseUp(TObject *Sender, TMouseButton Button,
      TShiftState Shift, int X, int Y)
{lbMouseDown = false;}
 
void __fastcall TExplorer::mapMouseMove(TObject *Sender, TShiftState Shift,
      int X, int Y)
{
        if (lbMouseDown) {
                map_panel_support->Top += Y - startY;
                map_panel_support->Left += X - startX;
 
                if (map_panel_support->Top > 0) map_panel_support->Top = 0;
                if (map_panel_support->Left > 0) map_panel_support->Left = 0;
                if (map_panel_support->Top < (map_panel->Height - map_panel_support->Height)) map_panel_support->Top = (map_panel->Height - map_panel_support->Height);
                if (map_panel_support->Left < (map_panel->Width - map_panel_support->Width)) map_panel_support->Left = (map_panel->Width - map_panel_support->Width);
 
                startX = X;
                startY = Y;
        }
}
 
//video timer: realization
void __fastcall TExplorer::timer_videoTimer(TObject *Sender)
{
        seconds += 1;
        minutes = static_cast<unsigned int>(seconds/60);
 
        char bufferS[1024] = {'\0'};
        char bufferM[1024] = {'\0'};
 
        itoa(seconds-minutes*60,bufferS,10);
        itoa(minutes,bufferM,10);
 
        l_time_present->Caption = timeConcatenate(bufferM, ':', bufferS, seconds-minutes*60 < 10 ? '0' : NULL);
 
        if (seconds == totalTime) {
                media_player->Stop();
                button_display_stop->Visible = false;
                button_display_play->Visible = true;
                timer_video->Enabled = false;
                seconds = 0;
                minutes = 0;
        }
}
 
//animation: realization
bool end = false;
 
void __fastcall TExplorer::timer_animationTimer(TObject *Sender)
{
        if (end) {
                panelObjVT->Left = 0;
                timer_animation->Enabled = false;
                end = false;
        } else {
                panelObjVT->Left -= 40;
                if (panelObjVT->Left-40 <= 0) end = true;
        }
}