\documentclass[10pt,a4paper]{article}

% Packages
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\usepackage{multicol}           % Allows multicols in tables
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\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{Pushpender Singh (PushpenderIndia)}
\pdfinfo{
  /Title (comprehensive-c-language.pdf)
  /Creator (Cheatography)
  /Author (Pushpender Singh (PushpenderIndia))
  /Subject (Comprehensive C Language Cheat Sheet)
}

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% Commands
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% 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{Comprehensive C Language Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Pushpender Singh (PushpenderIndia)} via \textcolor{DarkBackground}{\uline{cheatography.com/147152/cs/31961/}}}
\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}Pushpender Singh (PushpenderIndia) \\
  \uline{cheatography.com/pushpenderindia} \\
  \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 16th February, 2023.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
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  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
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% 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}{C Programming}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{Mid-Level}} (features of both low \& high level), {\bf{Structural}} (ability to break program into parts/block), {\bf{Procedural Oriented}} programming language developed by {\bf{Dennis Ritchie}} in {\bf{1972}}.} \tn 
% Row Count 4 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Hello World Program}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\#include\textless{}stdio.h\textgreater{} \newline int main() \newline \{ \newline     printf("Hello World"); \newline     return(0); \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}{Comments in C}}  \tn
% Row 0
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\mymulticolumn{1}{x{5.377cm}}{Used for documenting code, Compiler ignores the comments in c program. Two Types:} \tn 
% Row Count 2 (+ 2)
% Row 1
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\mymulticolumn{1}{x{5.377cm}}{{\bf{1. Single Line Comments}}: Starts with double slash ({\bf{//}})} \tn 
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% Row 2
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\mymulticolumn{1}{x{5.377cm}}{{\bf{2. Multi Line Comments}}: Starts with /* \& Ends with */} \tn 
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\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{printf Function}}  \tn
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\mymulticolumn{1}{x{5.377cm}}{{\bf{Used to show output on the screen/console.}}} \tn 
% Row Count 1 (+ 1)
% Row 1
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\mymulticolumn{1}{x{5.377cm}}{`printf(format\_string, data\_to\_print);`} \tn 
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% Row 2
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\mymulticolumn{1}{x{5.377cm}}{`printf("\%s", "Pushpender Singh");`} \tn 
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% Row 3
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\mymulticolumn{1}{x{5.377cm}}{{\bf{Format string}} can be \%d ({\bf{integer}}), \%c ({\bf{character}})**} \tn 
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\mymulticolumn{1}{x{5.377cm}}{{\bf{ \%s (}}string{\bf{), \%f (}}float{\bf{)}}, \%lf ({\bf{double}})} \tn 
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\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{scanf Function}}  \tn
% Row 0
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\mymulticolumn{1}{x{5.377cm}}{{\bf{Used to take command line input from the user.}} e.g.} \tn 
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% Row 1
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\mymulticolumn{1}{x{5.377cm}}{{\bf{Syntax}}: `scanf("format string", argument\_list);`} \tn 
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% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`scanf("\%d", \&num); // Take integer \& store it in num variable`} \tn 
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\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Data Types in C}}  \tn
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\mymulticolumn{1}{x{5.377cm}}{A data type specifies the type of data that a variable} \tn 
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% Row 1
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\mymulticolumn{1}{x{5.377cm}}{{\bf{There are 4 Types of DataTypes:}}} \tn 
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\mymulticolumn{1}{x{5.377cm}}{1. {\bf{Basic/Fundamental}}: int, char, float, double} \tn 
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\mymulticolumn{1}{x{5.377cm}}{2. {\bf{Derived}}: array, pointer, structure, union} \tn 
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\mymulticolumn{1}{x{5.377cm}}{3. {\bf{Enumeration Data Type}}: enum} \tn 
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% Row 5
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\mymulticolumn{1}{x{5.377cm}}{4. {\bf{Void Data Type}}: void} \tn 
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\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Variables in C}}  \tn
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\mymulticolumn{1}{x{5.377cm}}{Variable is a {\bf{Name of Memory Location}}, {\bf{Used to Store \& Access Data}}} \tn 
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\mymulticolumn{1}{x{5.377cm}}{{\bf{Syntax to declare variable:}} `DataType VariableName = Value;`} \tn 
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\mymulticolumn{1}{x{5.377cm}}{{\bf{e.g.}} `int rollNo = 69;`} \tn 
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\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{General Rules for Constructing Variable Name}}  \tn
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\mymulticolumn{1}{x{5.377cm}}{1. Variable can have {\bf{alphabets}}, {\bf{digits}} \& {\bf{underscore}}.} \tn 
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\mymulticolumn{1}{x{5.377cm}}{2. Can start with the {\bf{alphabet}} \& {\bf{underscore only}}. It {\bf{CANNOT}} start with a {\bf{digit}}.} \tn 
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\mymulticolumn{1}{x{5.377cm}}{3. {\bf{No whitespace is allowed}} within the variable name.} \tn 
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\mymulticolumn{1}{x{5.377cm}}{4. {\bf{CANNOT}} be any {\bf{Reserved word}} or {\bf{Keyword}} e.g. int, float, etc.} \tn 
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\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Declaring Variable of Other DataTypes}}  \tn
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\mymulticolumn{1}{x{5.377cm}}{// Create variables \newline {\bf{int}} age = 35;             \newline {\bf{float}} percentage = 94.86;   // {\bf{7 digit Decimal Precision}} \newline {\bf{double}} pi\_value = 3.14159265359;   // {\bf{15 Decimal Precision}} \newline {\bf{char}} section = 'A';    \newline  \newline // String: Array of Characters \newline {\bf{char}} name{[}{]} = "Pushpender Singh";  \newline   \newline // Print variables \newline printf("Age: {\bf{\%d}}\textbackslash{}n", age); \newline printf("Percentage: {\bf{\%f}}\textbackslash{}n", percentage); \newline printf("Percentage (Only 1 Decimal): {\bf{\%.1f}}\textbackslash{}n", percentage); \newline printf("Value of Pi: {\bf{\%lf}}\textbackslash{}n", pi\_value); \newline printf("Section: {\bf{\%c}}\textbackslash{}n", char);  \newline printf("Name: {\bf{\%s}}\textbackslash{}n", name);} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.14425 cm} x{1.09848 cm} x{2.33427 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{5.377cm}}{\bf\textcolor{white}{Data Types}}  \tn
% Row 0
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{\bf{Data Type}} & {\bf{Size}} & {\bf{Description}} \tn 
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int & 2 or 4 bytes & e.g 20, 30, etc \tn 
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float & 4 bytes & Hold Upto 7 Decimal Digit \tn 
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double & 8 bytes & Hold Upto 15 Decimal Digit \tn 
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char & 1 byte & e.g. 'A', 'B', etc \tn 
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\hhline{>{\arrayrulecolor{DarkBackground}}---}
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\begin{tabularx}{5.377cm}{X}
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\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Type Casting}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{// {\bf{Implicit Casting}} (Automatic) \newline float  lol = 10;  // int to float \newline printf("\%f", lol); // Output: 10.000000 \newline  \newline int noice = 95.555  // float to int \newline printf("\%d", noice); // Output: 95 \newline  \newline // {\bf{Explicit Casting}} (Manual) \newline float sum = (float) 5 / 2; //  int to float \newline printf("\%f", sum); // 2.500000} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}