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.gitattributes

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+###############################################################################
+# Set default behavior to automatically normalize line endings.
+###############################################################################
+* text=auto
+
+###############################################################################
+# Set default behavior for command prompt diff.
+#
+# This is need for earlier builds of msysgit that does not have it on by
+# default for csharp files.
+# Note: This is only used by command line
+###############################################################################
+#*.cs     diff=csharp
+
+###############################################################################
+# Set the merge driver for project and solution files
+#
+# Merging from the command prompt will add diff markers to the files if there
+# are conflicts (Merging from VS is not affected by the settings below, in VS
+# the diff markers are never inserted). Diff markers may cause the following 
+# file extensions to fail to load in VS. An alternative would be to treat
+# these files as binary and thus will always conflict and require user
+# intervention with every merge. To do so, just uncomment the entries below
+###############################################################################
+#*.sln       merge=binary
+#*.csproj    merge=binary
+#*.vbproj    merge=binary
+#*.vcxproj   merge=binary
+#*.vcproj    merge=binary
+#*.dbproj    merge=binary
+#*.fsproj    merge=binary
+#*.lsproj    merge=binary
+#*.wixproj   merge=binary
+#*.modelproj merge=binary
+#*.sqlproj   merge=binary
+#*.wwaproj   merge=binary
+
+###############################################################################
+# behavior for image files
+#
+# image files are treated as binary by default.
+###############################################################################
+#*.jpg   binary
+#*.png   binary
+#*.gif   binary
+
+###############################################################################
+# diff behavior for common document formats
+# 
+# Convert binary document formats to text before diffing them. This feature
+# is only available from the command line. Turn it on by uncommenting the 
+# entries below.
+###############################################################################
+#*.doc   diff=astextplain
+#*.DOC   diff=astextplain
+#*.docx  diff=astextplain
+#*.DOCX  diff=astextplain
+#*.dot   diff=astextplain
+#*.DOT   diff=astextplain
+#*.pdf   diff=astextplain
+#*.PDF   diff=astextplain
+#*.rtf   diff=astextplain
+#*.RTF   diff=astextplain

.gitignore

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+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+
+# Visual Studio 2015 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# DNX
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# TODO: Comment the next line if you want to checkin your web deploy settings
+# but database connection strings (with potential passwords) will be unencrypted
+#*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# The packages folder can be ignored because of Package Restore
+**/packages/*
+# except build/, which is used as an MSBuild target.
+!**/packages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/packages/repositories.config
+# NuGet v3's project.json files produces more ignoreable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+node_modules/
+orleans.codegen.cs
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+*.mdf
+*.ldf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# JetBrains Rider
+.idea/
+*.sln.iml
+
+# CodeRush
+.cr/
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc

.vscode/launch.json

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+{
+   // Use IntelliSense to find out which attributes exist for C# debugging
+   // Use hover for the description of the existing attributes
+   // For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
+   "version": "0.2.0",
+   "configurations": [
+        {
+            "name": ".NET Core Launch (console)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            // If you have changed target frameworks, make sure to update the program path.
+            "program": "${workspaceFolder}/bin/Debug/netcoreapp2.0/FCS.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            // For more information about the 'console' field, see https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md#console-terminal-window
+            "console": "internalConsole",
+            "stopAtEntry": false,
+            "internalConsoleOptions": "openOnSessionStart"
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach",
+            "processId": "${command:pickProcess}"
+        }
+    ,]
+}

.vscode/tasks.json

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+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/FCS.csproj"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

Program.c

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+#include <iostream>
+#include <string>
+#include <sstream>
+#include<unistd.h>
+using namespace std;
+
+#define POLY 0x1021
+string t;
+int a,e,c;
+unsigned short EncodeCRT(char *ptr, int count)
+{
+   int  crc;
+   char i;
+   crc = 0xffff;
+   while (--count >= 0)
+   {
+      crc = crc ^ (int) *ptr++ << 8;
+      i = 8;
+      do
+      {
+         if (crc & 0x8000)
+            crc = crc << 1 ^ 0x1021;
+         else
+            crc = crc << 1;
+      } while(--i);
+   }
+   return (crc);
+}
+
+string CheckCrc(string message)
+{
+    string crc="1000000100001";
+    for(int i=0;i<=message.length()-crc.length();)
+    {
+          for(int j=0;j<crc.length();j++)
+            message[i+j]=message[i+j]==crc[j]? '0' : '1';
+          for( ; i<message.length() && message[i]!='1';i++);
+    }
+    for(char i: message.substr(message.length()-crc.length()))
+      if(i!='0')
+      {
+            return "FALSE";
+      }
+    return "TRUE";
+}
+const char* hex_char_to_bin(char c)
+{
+    // TODO handle default / error
+    switch(toupper(c))
+    {
+        case '0': return "0000";
+        case '1': return "0001";
+        case '2': return "0010";
+        case '3': return "0011";
+        case '4': return "0100";
+        case '5': return "0101";
+        case '6': return "0110";
+        case '7': return "0111";
+        case '8': return "1000";
+        case '9': return "1001";
+        case 'A': return "1010";
+        case 'B': return "1011";
+        case 'C': return "1100";
+        case 'D': return "1101";
+        case 'E': return "1110";
+        case 'F': return "1111";
+    }
+}
+
+std::string hexToBin(string &hex)
+{
+    // TODO use a loop from <algorithm> or smth
+    std::string bin;
+    for(unsigned i = 0; i != hex.length(); ++i)
+       bin += hex_char_to_bin(hex[i]);
+    return bin;
+}
+void two(string &in)
+{
+      
+}
+int main()
+{
+            char* input;
+            cout<<("1. Zakoduj wiadomosc");
+                cout<<("2. Odkoduj wiadomosc");
+                cout<<("3. Wyjscie");
+                int choice=0;
+                cin>>choice;
+                cin.ignore();
+                if(choice==1)
+                {
+                    int cc=0;
+                    cout<<("Podaj dlugosc wiadomosci.(ilosc liter ze spacjami wlacznie)");
+                    cin>>cc;
+                    input=new char[cc];
+                    cout<<("Podaj wiadomosc do zaszyfrowania.");
+                    cin.ignore();
+                    cin.getline(input,cc+1);
+                    unsigned short result =EncodeCRT(input,cc);
+                    
+                    for(int i=0;i<cc;i++){
+                        printf("%x",input[i]);
+                        printf(" ");
+                    }
+                    printf("%x",result);
+                    printf("  ");
+                    
+                }
+                    if(choice==2)
+                    {
+
+                         string input3;
+                         cout<<"Podaj wiadomosc do odkodowania w systemie szesnastkowym, bez spacji.";
+                         cin>>input3;
+                          string xd;
+                          std::stringstream ss;
+                        std::string bin;
+                        string hex=input3;
+
+    for(unsigned i = 0; i != hex.length(); ++i)
+       {
+       switch(toupper(hex[i]))
+    {
+        case '0': bin+= "0000"; break;
+        case '1': bin+= "0001"; break;
+        case '2': bin+= "0010"; break;
+        case '3': bin+= "0011"; break;
+        case '4': bin+= "0100";break;
+        case '5': bin+= "0101";break;
+        case '6': bin+= "0110";break;
+        case '7': bin+= "0111";break;
+        case '8': bin+= "1000";break;
+        case '9': bin+= "1001";break;
+        case 'A': bin+= "1010";break;
+        case 'B': bin+= "1011";break;
+        case 'C': bin+= "1100";break;
+        case 'D': bin+= "1101";break;
+        case 'E': bin+= "1110";break;
+        case 'F': bin+= "1111";break;
+    }
+       }
+       
+       string crc="1000000100001";
+       string message=bin;
+       int l=message.length();
+       int cl=crc.length();
+       int ii=0;
+       int k=0;
+      l=message.length();
+    while(true)
+    {
+          if(ii>l-cl) break;
+         for(int j=0;j<cl;j++)
+          {  
+             message[ii+j]=message[ii+j]==crc[j]? '0' : '1';
+          }
+         while(ii<l && message[ii]!='1')
+         {
+               ii++;
+         }
+    }
+    string x=message.substr(message.length()-crc.length());
+    cout<<x;
+    for(char i: x)
+      if(i=='1')
+      {
+            cout<<"FALSE";
+            return 0;
+      }
+      cout<<"TRUE";
+      return 0;
+     }
+                    if(choice==3)
+                    {
+                        return 0;
+                    }
+    return 0;
+}

README.md.txt

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+Aplikacja konsolowa napisana w jezyku C++. Aby odpalic nalezy skompilowac komenda g++ Program.c.