\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{Ruan}
\pdfinfo{
  /Title (cs50.pdf)
  /Creator (Cheatography)
  /Author (Ruan)
  /Subject (CS50 Cheat Sheet)
}

% Lengths and widths
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\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
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\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
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\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{0388A3}
\definecolor{LightBackground}{HTML}{EFF7F9}
\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{CS50 Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Ruan} via \textcolor{DarkBackground}{\uline{cheatography.com/126499/cs/24505/}}}
\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}Ruan \\
  \uline{cheatography.com/ruan} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 28th September, 2020.\\
   Updated 28th September, 2020.\\
   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}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Project base}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{// include Standard Input and Output \newline \#include \textless{}stdio.h\textgreater{} \newline // include CS 50 helper \newline \#include \textless{}cs50.h\textgreater{} \newline  \newline int main(void) \newline \{ \newline     // Asks for the user name \newline     string name = get\_string("What is your name? "); \newline     // Print the message \newline     printf("hello, \%s.\textbackslash{}n", name); \newline \}} \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}{Declaring variables}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{// Variables declaration \newline // The structure to declare variables is: \newline // type variable\_name; \newline  \newline int my\_integer; \newline char my\_single\_char; \newline bool true\_or\_false; \newline string a\_long\_string; \newline float price; \newline  \newline // you can also declare multiple vars of the same type in one line \newline string first, last, full; \newline int total, a, b; \newline  \newline  \newline // assign "=" values to a variable \newline  \newline my\_integer = 10; \newline my\_single\_char = 'A'; \newline true\_or\_false = true; \newline a\_long\_string = "A really long text"; \newline price = 1.25; \newline // note: When working with strings the value needs to be under double quotes " \newline // When working with chars the value needs to be under single quotes ' \newline  \newline // intialization \newline int my\_age = 30; \newline float product\_price = 123.45; \newline string message = "thank you"; \newline char letter = 'A';} \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}{Conditional statements}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{if (boolean-expression) \newline \{ \newline     // code if true \newline \} \newline  \newline // -{}-{}-{}-{}-{}- \newline  \newline if (boolean-expression) \newline \{ \newline     // code if true \newline \} \newline else \newline \{ \newline     //code if false \newline \} \newline  \newline // -{}-{}-{}-{}-{}- \newline if (boolean-expression) \newline \{ \newline     // code if true \newline \} \newline else if \seqsplit{(another-boolean-expression)} \newline \{ \newline     //code if first is false but second is true \newline \} \newline else \newline \{ \newline     //code if all are false \newline \} \newline  \newline //-{}-  \newline // Example ok ?: use \newline int x; \newline if (boolean-expression) \newline \{ \newline     x = 5; \newline \} \newline else \newline \{ \newline     x = 10; \newline \} \newline // this is a short form of the same code above \newline int x = boolean-expression ? 5 : 10; \newline  \newline //-{}-{}-{}-{}-{}-{}-- \newline  \newline int my\_number = 10; \newline switch(my\_number) \newline \{ \newline     case 1: \newline         printf("Number is 1"); \newline         break; \newline     case 10: \newline         printf("Number is 10"); \newline         break; \newline     default: \newline         printf("Number is invalid"); \newline \}} \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}{Loops}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{while (boolean-expression) \newline \{ \newline     // code will be executed while the boolean-expression is true \newline \} \newline  \newline  \newline do \newline \{ \newline     // do-while will always execute at least once. \newline     // code will be executed while the boolean-expression is true \newline \} \newline while (boolean-expression); \newline  \newline  \newline for (initilization ; boolean-expression ; increment) \newline \{ \newline      \newline \} \newline  \newline for (int index = 0 ; index \textless{} 20 ; index ++) \newline \{ \newline      \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.64701 cm} x{4.32999 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Data Types}}  \tn
% Row 0
\SetRowColor{LightBackground}
int & Integers - 4 bytes (32 bits) \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
char & Single characters - 1 byte (8 bits) \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
float & Real numbers - 4 bytes (32 bits) \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
\seqsplit{double} & Double precision for floats \tn 
% Row Count 6 (+ 2)
% Row 4
\SetRowColor{LightBackground}
void & Is a type but not a Data Type. Used in functions to say that params or returns are not required \tn 
% Row Count 9 (+ 3)
% Row 5
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{CS50 ones} \tn 
% Row Count 10 (+ 1)
% Row 6
\SetRowColor{LightBackground}
bool & Boolean value (true or false) \tn 
% Row Count 11 (+ 1)
% Row 7
\SetRowColor{white}
\seqsplit{string} & Serie of characters (words, sentences, etc) \tn 
% Row Count 13 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.64701 cm} x{4.32999 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Arithmetic Operators}}  \tn
% Row 0
\SetRowColor{LightBackground}
+ & Sum (add) \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
- & Subtraction \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
* & Multiplication \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
/ & Division \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\% & Module, gets the remainder (15 \% 7 == 1) \tn 
% Row Count 6 (+ 2)
% Row 5
\SetRowColor{white}
x++ & x = x + 1 \tn 
% Row Count 7 (+ 1)
% Row 6
\SetRowColor{LightBackground}
x-{}- & x = x - 1 \tn 
% Row Count 8 (+ 1)
% Row 7
\SetRowColor{white}
x += 5 & x = x + 5 \tn 
% Row Count 10 (+ 2)
% Row 8
\SetRowColor{LightBackground}
x *=5 & x = x * 5 \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}{Boolean expressions}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{Boolean expression is used in C to compare values. \newline % Row Count 2 (+ 2)
There are just two possible values for it {\bf{true}} or {\bf{false}}. \newline % Row Count 4 (+ 2)
On boolean expressions, anything other than {\bf{false, 0 or NULL}} is considered as {\bf{true}}. \newline % Row Count 6 (+ 2)
Logical operators: \newline % Row Count 7 (+ 1)
\&\& - {\bf{AND}} is true only if both operands are true, otherwise false \newline % Row Count 9 (+ 2)
|| - {\bf{OR}} is false only if both operands are false, otherwise true \newline % Row Count 11 (+ 2)
! - {\bf{NOT}} inverts the value of its operand. \newline % Row Count 12 (+ 1)
Relational operators \newline % Row Count 13 (+ 1)
== -  {\bf{EQUAL}} is true only if both operands are equal. \newline % Row Count 15 (+ 2)
!= - {\bf{NOT EQUAL}} is true if the operands are not equal. \newline % Row Count 17 (+ 2)
\textless{} - {\bf{LESS THAN}} is true if the left operand is less than the one in the right. \newline % Row Count 19 (+ 2)
\textgreater{} - {\bf{GREATER THAN}} is true if the left operand is greater than the one in the right. \newline % Row Count 21 (+ 2)
\textgreater{}= - {\bf{GREATER THAN OR EQUAL TO}} is true if the left operand is greater than or equal to the one in the right. \newline % Row Count 24 (+ 3)
\textless{}= - {\bf{LESS THAN OR EQUAL TO}}  is true if the left operand is less or equal than the one in the right.% Row Count 27 (+ 3)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.28942 cm} x{2.68758 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{cs50.h Functions}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{get\_char("MESSAGE")} & prompts user for a char \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\seqsplit{get\_double("MESSAGE")} & prompts user for a double \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{get\_float("MESSAGE")} & prompts user for a float \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{get\_int("MESSAGE")} & prompts user for an int \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{get\_long("MESSAGE")} & prompts user for an long \tn 
% Row Count 10 (+ 2)
% Row 5
\SetRowColor{white}
\seqsplit{get\_string("MESSAGE")} & prompts user for a string \tn 
% Row Count 12 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{1.19002 cm} p{1.46464 cm} x{1.92234 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{5.377cm}}{\bf\textcolor{white}{Truth table}}  \tn
% Row 0
\SetRowColor{LightBackground}
 & AND \&\& &  \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
x & y & (x \&\& y) \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
true & true & true \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
true & false & false \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
false & true & false \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
false & false & false \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
 & OR || &  \tn 
% Row Count 7 (+ 1)
% Row 7
\SetRowColor{white}
x & y & (x || y) \tn 
% Row Count 8 (+ 1)
% Row 8
\SetRowColor{LightBackground}
true & true & true \tn 
% Row Count 9 (+ 1)
% Row 9
\SetRowColor{white}
true & false & true \tn 
% Row Count 10 (+ 1)
% Row 10
\SetRowColor{LightBackground}
false & true & true \tn 
% Row Count 11 (+ 1)
% Row 11
\SetRowColor{white}
false & false & false \tn 
% Row Count 12 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.43873 cm} x{2.53827 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Linux commands}}  \tn
% Row 0
\SetRowColor{LightBackground}
make file\_name & Complile the code \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
./file\_name & Execute a compiled file \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
cd folder\_name & Change directory \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
cd & Go back to the home folder (\textasciitilde{}) \tn 
% Row Count 6 (+ 2)
% Row 4
\SetRowColor{LightBackground}
cp original\_file copied\_file & Copy file \tn 
% Row Count 8 (+ 2)
% Row 5
\SetRowColor{white}
ls & List files \tn 
% Row Count 9 (+ 1)
% Row 6
\SetRowColor{LightBackground}
mkdir \seqsplit{name\_of\_the\_folder} & Create a folder \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
pwd & show the current path \tn 
% Row Count 13 (+ 2)
% Row 8
\SetRowColor{LightBackground}
rm file\_name & Remove a file \tn 
% Row Count 14 (+ 1)
% Row 9
\SetRowColor{white}
rm -R folder & Remove a folder recursively \tn 
% Row Count 16 (+ 2)
% Row 10
\SetRowColor{LightBackground}
touch file\_name & Create a file \tn 
% Row Count 17 (+ 1)
% Row 11
\SetRowColor{white}
mv original\_file renamed\_file & Rename or move a file \tn 
% Row Count 19 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.69678 cm} x{4.28022 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{String scapes}}  \tn
% Row 0
\SetRowColor{LightBackground}
\textbackslash{}n & New line \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\textbackslash{}r & Return \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\textbackslash{}t & Tab \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\textbackslash{}" & Double quote \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\textbackslash{}\textbackslash{} & Backslash \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{more \seqsplit{http://www.lix.polytechnique}.fr/\textasciitilde{}liberti/public/computing/prog/c/C/FUNCTIONS/escape.html}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{0.84609 cm} x{4.13091 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Format String}}  \tn
% Row 0
\SetRowColor{LightBackground}
\%c & Char \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\%s & String \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\%d || \%i & Int \tn 
% Row Count 4 (+ 2)
% Row 3
\SetRowColor{white}
\%f & Double or float \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\%.\#f & Float (limit the output to \# decimal places) \tn 
% Row Count 7 (+ 2)
% Row 5
\SetRowColor{white}
\%\% & \% \tn 
% Row Count 8 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}