1.

#include "stdafx.h"

using namespace System;
using namespace System::IO;
using namespace System::Text;

int main(array<System::String ^> ^args)
{
	StreamReader ^sr1 = nullptr;
	try{
		sr1 = gcnew StreamReader(L"dane.txt");
	}
	catch (Exception ^e)
	{
		Console::WriteLine("Błąd!-->{0}", e->Message);
		Console::ReadKey();
		return -1;
	}
	String ^s = sr1->ReadLine();
	array<String ^>^ds = s->Trim()->Split(L' ');
	double x1 = double::Parse(ds[0]);
	double y1 = double::Parse(ds[ds->Length-1]);
	s = sr1->ReadLine();
	sr1->Close();
	array<String ^>^dt = s->Trim()->Split(L' ');
	double x2 = double::Parse(dt[0]);
	double y2 = double::Parse(dt[dt->Length - 1]);
	double dx = x2 - x1;
	double dy = y2 - y1;
	double d = Math::Sqrt(dx*dx + dy*dy);
	Console::WriteLine(L"Odleglosc = {0}", d);
	StreamWriter ^sr2 = nullptr;
	try
	{
		sr2 = gcnew StreamWriter(L"wynik.txt", false, Encoding::UTF8);
	}
	catch (Exception ^e)
	{
		Console::WriteLine("Błąd!-->{0}", e->Message);
		Console::ReadKey();
		return -1;
	}
	sr2->WriteLine(d);
	sr2->Close();
	Console::ReadKey();
    return 0;
}


2.

#include "stdafx.h"

using namespace System;
using namespace System::IO;
using namespace System::Text;

int main(array<System::String ^> ^args)
{
	int n = int::Parse(Console::ReadLine());
	Random ^r = gcnew Random();
	StreamWriter ^sr = nullptr;
	try
	{
		sr = gcnew StreamWriter(L"wynik.txt", false, Encoding::UTF8);
	}
	catch (Exception ^e)
	{
		Console::WriteLine("Błąd!-->{0}", e->Message);
		Console::ReadKey();
		return -1;
	}
	for (int i = 0; i < n; i++)
	{
		sr->WriteLine(r->Next(n));
	}
	sr->Close();
	Console::ReadKey();
    return 0;
}


3.

#include "stdafx.h"

using namespace System;
using namespace System::IO;
using namespace System::Text;

int main(array<System::String ^> ^args)
{
	String ^path = Console::ReadLine();
	StreamWriter ^sr = nullptr;
	try{
		sr = gcnew StreamWriter(path, false, Encoding::UTF8);
	}
	catch (Exception ^e)
	{
		Console::WriteLine("Błąd!-->{0}", e->Message);
		Console::ReadKey();
		return -1;
	}
	sr->WriteLine("Polskie znaki: ąęćłóśżź");
	sr->Close();
    return 0;
}


4.

#include "stdafx.h"

using namespace System;
using namespace System::IO;
using namespace System::Text;

int main(array<System::String ^> ^args)
{
	String ^path = Console::ReadLine();
	StreamReader ^sr = nullptr;
	try{
		sr = gcnew StreamReader(path);
	}
	catch (Exception ^e)
	{
		Console::WriteLine("Błąd!-->{0}", e->Message);
		Console::ReadKey();
		return -1;
	}
	String ^s = sr->ReadLine();
	Console::WriteLine(s);
	sr->Close();
    return 0;
}


5.