Логирование работы программы

//Logging.h
#include "stdafx.h"
#include <iostream>
#include <conio.h>
using namespace std;
using namespace System;
using namespace System::IO;
class Logging
{
public:
    static void WriteToLog(string msg)
    {
        FileStream^ fs = gcnew FileStream( "c:\\temp\\Log.txt",FileMode::Append,FileAccess::Write,FileShare::Write );
        fs->Close();
        StreamWriter^ sw = gcnew StreamWriter( "c:\\temp\\Log.txt",true);
        string NextLine = (msg);
        sw->WriteLine( NextLine );
        sw->Close();
    } 
};

//Logging.cpp
#include "stdafx.h"
#include "Logging.h"
using namespace std;
 
 
int main()
{
    Logging::WriteToLog("FuncName  main");
 
}

std::string str = "abcd";
System::String sysStr = gcnew ::String (str.c_str());

// convert_system_string.cpp
// compile with: /clr
#include <string>
#include <iostream>
using namespace std;
using namespace System;
 
void MarshalString ( String ^ s, string& os ) {
   using namespace Runtime::InteropServices;
   const char* chars = 
      (const char*)(Marshal::StringToHGlobalAnsi(s)).ToPointer();
   os = chars;
   Marshal::FreeHGlobal(IntPtr((void*)chars));
}
 
void MarshalString ( String ^ s, wstring& os ) {
   using namespace Runtime::InteropServices;
   const wchar_t* chars = 
      (const wchar_t*)(Marshal::StringToHGlobalUni(s)).ToPointer();
   os = chars;
   Marshal::FreeHGlobal(IntPtr((void*)chars));
}
 
int main() {
   string a = "test";
   wstring b = L"test2";
   String ^ c = gcnew String("abcd");
 
   cout << a << endl;
   MarshalString(c, a);
   c = "efgh";
   MarshalString(c, b);
   cout << a << endl;
   wcout << b << endl;
}

#include <ctime>
#include <fstream>
#include <iostream>
using namespace std;
 
/**/ //òå ñòðîêè êîòîðûå îòìå÷åíû ýòèì çíàêîì ïîñëå
//óñïåøíûõ òåñòîâ ïðîñòî óäàëÿåì
ofstream log("log.txt");//Îáúÿâëÿåì íàø ïîòîê çàïèñè
const int N = 5;//Ïóñòü áóäåò ìàññèâ èç 5-òè ýëåìåíòîâ
 
//Ôóíêöèÿ ïå÷àòàåò ìàññèâ íà ýêðàíå
void showArr(int n, int * arr);
//Ôóíêöèÿ ðàíäîè\ìíî çàïîëíÿåò ìàññèâ
void fillArr(int n, int * arr);
//Ñîáñòâåííî ôóíêöèÿ çàïèñûâàåò â ìàññèâ
//âìåcòî i-ãî ýëåìåíòà ðåçóëüòàò val/arr[i]
//ïîìíèì ÷òî ó íàñ ãàðàíòèðîâàíî â ìàññèâå åñòü 0
void divArr (int n, int * arr, int val);
 
//Ïåðåãðóæåííàÿ ôóíêöèÿ îñóùåñòâëÿþùàÿ çàïèñü â ïîòîê ifs 
//ðàçìåðà è çíà÷åíèé ìàññèâà arr
void showArr(int n, int * arr, ofstream &ofs);
 
int main()
{
    int a[N] = {0};
    //Ýòî áóäåò èíäåêñ ýëåìåíòà ñ íóë¸âûì çíà÷åíèåì
    int j = rand()%(N - 1);
    //Íàïîëíÿåì ìàññèâ íåíóëåâûìè çíà÷åíèÿìè ñëó÷àéíûì îáðàçîì
    fillArr(N, a);
    //Ïðèñâàåâàåì çíà÷åíèå 0 j - ìó èíäåêñó
    a[j] = 0;//Ïðè÷¸ì ÿ íå çíàþ êàêîé ýòî ïî ñ÷¸òó 
    //èíäåêñ è ïðîãðàììà äî íà÷àëà ðàáîòû íå çíàåò
    //êîðî÷å òàê ñêàçàòü ðàíäîìíàÿ îøèáêà
 
    //ïå÷àòàåì ýëåìåíòû ìàññèâà
    cout<<"Input  array : ";showArr(N, a);
    divArr (N, a, 11);//Âîò íàøà êîððåêòíàÿ ôóíêöèÿ,
    //êîòîðàÿ íåêîððåêòíî îòðàáîòàåò ïðè äåëåíèè íà 0
    cout<<"Output array : ";showArr(N, a);
    
    return 0;
}
 
void showArr(int n, int * arr)
{
    for(int i = 0; i < n; i++)
        cout<<arr[i]<<" ";
    cout<<endl;
}
 
void fillArr(int n, int * arr)
{
    //Ñîáñòâåííî îãîâîðåííàÿ ìíîé âñòàâêà âíà÷àëå è êîíöå ôóíêöèè
    /**/log<<"\tfillArr started :\nparams > \n";
    /**/showArr(n, arr,log);/**/
    srand(time(0));
    for(int i = 0; i < n; i++)
        arr[i] = 1 + rand()%10;
    /**/log<<"\tfillArr ended   :\nparams > \n";
    /**/showArr(n, arr,log);/**/
}
 
void divArr (int n, int * arr, int val)
{
    /**/log<<"\tdivArr started :\nparams > \n";
    /**/showArr(n, arr,log);/**/
    srand(time(0));
    for(int i = 0; i < n; i++)
    {
        arr[i] = val / arr[i];
        /**/log<<"\tdivArr iteration :"<<i + 1<<endl;
        /**/log<<"\tdivArr params > \n";
        /**/showArr(n, arr,log);/**/
        
    }
    /**/log<<"\tdivArr ended   :\nparams > \n";
    /**/showArr(n, arr,log);/**/
}
 
 
//ôóíêöèÿ çàïèøåò â ïîòîê ìàññèâ åñëè arr arr != 0 
void showArr(int n, int * arr, ofstream &ofs)
{
    if(arr)
    {
        ofs<<n<<endl;
        for(int i = 0; i < n; i++)
            ofs<<arr[i]<<" ";
        ofs<<endl;
    }
}