\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{Technecure}
\pdfinfo{
  /Title (c-cheatsheet.pdf)
  /Creator (Cheatography)
  /Author (Technecure)
  /Subject (C++ Cheatsheet Cheat Sheet)
}

% Lengths and widths
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\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{6381F7}
\definecolor{LightBackground}{HTML}{F5F7FE}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{C++ Cheatsheet Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Technecure} via \textcolor{DarkBackground}{\uline{cheatography.com/84247/cs/19902/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Technecure \\
  \uline{cheatography.com/technecure} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 15th July, 2019.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{3}

\begin{tabularx}{5.377cm}{x{1.64241 cm} x{3.33459 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Common Data Types}}  \tn
% Row 0
\SetRowColor{LightBackground}
bool & 1 byte \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
char & 1 byte \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
int & 4 bytes (at least 2 bytes) \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
long int & 4 bytes \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
long long int & 8 bytes \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Header Files \& Common Includes}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\#include \textless{}filename\textgreater{}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\#include \textless{}iostream\textgreater{} // cin \& cout} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\#include \textless{}fsream\textgreater{} // file streams} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\#include \textless{}vector\textgreater{} // vectors} \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\#include \textless{}string\textgreater{} // strings} \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{1.34379 cm} x{3.63321 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Operators}}  \tn
% Row 0
\SetRowColor{LightBackground}
a + b & Addition \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
a - b & Subtraction \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
a * b & Multiplication \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
a / b & Division \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
a \% b & Modulus \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
a -= b & (a-b) store in a \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
a += b & (a+b) store in a \tn 
% Row Count 7 (+ 1)
% Row 7
\SetRowColor{white}
a /= b & (a/b) store in a \tn 
% Row Count 8 (+ 1)
% Row 8
\SetRowColor{LightBackground}
a *= b & (a*b) store in a \tn 
% Row Count 9 (+ 1)
% Row 9
\SetRowColor{white}
a++ & (a+1) store in a \tn 
% Row Count 10 (+ 1)
% Row 10
\SetRowColor{LightBackground}
a-{}- & (a-1) store in a \tn 
% Row Count 11 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{File IO}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{int main() \{ \newline     // this makes a new file stream \newline     fstream fileStream; \newline  \newline     // open text.txt to write to \newline     \seqsplit{fileStream.open("test.txt"}, ios::out); \newline  \newline     if (fileStream.is\_open()) \{ \newline         cout \textless{}\textless{} "File opened!" \textless{}\textless{} endl; \newline     \} \newline      \newline     // write a line to the file \newline     fileStream \textless{}\textless{} "Hello!\textbackslash{}n"; \newline  \newline     // must close to free the resource \newline     fileStream.close(); \newline  \newline     return 0; \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{Note that you must {\emph{close}} the file before you can {\emph{open}} a new new one. {\bf{ios::out}} means you want to write to the file and {\bf{ios::in}} means you want to read from the file. You write to a {\emph{file stream}} the same way you write to {\emph{cout}}.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Classes}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{class some\_name \{ \newline private:  \newline      int m\_some\_data1; \newline      double m\_some\_data2; \newline public: \newline      // this is a constructor \newline      some\_name(int a, double b) \{ \newline           m\_some\_data1 = a; \newline           m\_some\_data2 = b; \newline      \} \newline      // getters \newline      int get\_some\_data1() \{ \newline           return m\_some\_data1;  \newline      \} \newline      double get\_some\_data2() \{  \newline           return m\_some\_data2; \newline      \} \newline \}; \newline  \newline int main() \{ \newline      /{\emph{ makes a new object called name \newline         which is of some\_name type }}/ \newline      some\_name name(0, 2.1); \newline  \newline      return 0; \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{Classes are just like user defined types like {\bf{int}} or {\bf{double}}. When an object is created it calls the {\emph{constructor}}. The constructor is a function with the same name as the class.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.74655 cm} x{4.23045 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Comparison Operators}}  \tn
% Row 0
\SetRowColor{LightBackground}
a \textless{} b & True if a is less than b \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
a \textless{}= b & True if a is less than or = to b \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
a \textgreater{} b & True if a is greater than b \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
a \textgreater{}= b & True if a is greater than or = to b \tn 
% Row Count 5 (+ 2)
% Row 4
\SetRowColor{LightBackground}
a == b & True if a equals b \tn 
% Row Count 6 (+ 1)
% Row 5
\SetRowColor{white}
a \&\& b & True if a and b are true \tn 
% Row Count 7 (+ 1)
% Row 6
\SetRowColor{LightBackground}
a || b & True if a or b are true \tn 
% Row Count 8 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Note: If they do not meet the criteria to be {\bf{true}}, they are {\bf{false}}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Pointers}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{int main() \{ \newline      int x = 3; \newline  \newline      // \& gets the memory address of x \newline      int{\emph{ pointer\_to\_x = \&x; \newline  \newline      /}} pointers must be dereferenced with {\emph{* \newline         before they are accessed. }}/ \newline      *pointer = 5; \newline  \newline      return 0; \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{Note that pointers only hold a {\emph{memory address}}. They cannot store anything else. In order to actually get the data at the address they must {\emph{dereference}} it using the * operator.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.78712 cm} x{2.18988 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Pointers and References}}  \tn
% Row 0
\SetRowColor{LightBackground}
int* ptr = mem\_address; & pointer definition \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
int\& ref = other\_var; & lvalue reference \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Note: pointers hold a single memory address that you can change while a reference holds a single unchangeable memory address.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Pointers}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{int main() \{ \newline      int x = 3; \newline  \newline      // \& gets the memory address of x \newline      int{\emph{ pointer\_to\_x = \&x; \newline  \newline      /}} pointers must be dereferenced with {\emph{* \newline         before they are accessed. }}/ \newline      *pointer = 5; \newline  \newline      return 0; \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{Note that pointers only hold a {\emph{memory address}}. They cannot store anything else. In order to actually get the data at the address they must {\emph{dereference}} it using the * operator.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Functions \& Prototypes}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{void foo(); // prototype \newline void bar(int i); // prototype w/ params \newline  \newline void foo() \{ // foo definition \newline      std::cout \textless{}\textless{} "Foo function\textbackslash{}n"; \newline \} \newline  \newline void bar(int i) \{ // bar definition \newline      std::cout \textless{}\textless{} "Bar: " \textless{}\textless{} i \textless{}\textless{} "\textbackslash{}n"; \newline \} \newline  \newline int main() \{ // main definition \newline      foo(); // calls foo function \newline      bar(2); // calls bar with 2 \newline  \newline      return 0; \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{All programs must have a main function. This is the first function that gets called. All functions except main() should have a prototype.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}