# exemples.tex

\documentclass[12pt,a4paper]{article}
\usepackage[latin1]{inputenc}
\usepackage[frenchb]{babel}
\usepackage[margin=2.5cm]{geometry}
\usepackage[garamond]{mathdesign}
\renewcommand{\ttdefault}{lmtt}
\usepackage{graphicx}
\usepackage{xcolor}
\parindent0pt

\newcommand{\xcas}{{\bfseries\texttt{Xcas}}}

\title{Exemples d'utilisation de \texttt{Giac}}
\author{Jean-Michel Sarlat}

\newcommand{\MarqueCommandeGiac}[1]{%
\color[HTML]{8B7500}$\rightarrow$}
\newcommand{\MarqueLaTeXGiac}{%
\color[HTML]{08868B}}
\newcommand{\InscriptionFigureGiac}[1]{%
\begin{center}
\includegraphics[width=0.7\linewidth]{#1}
\end{center}}

\pagestyle{empty}
\begin{document}

\maketitle
\thispagestyle{empty}

La plupart des exemples qui apparaissent ici sont tirés du
\emph{tutorial} de \xcas.

\section{Premiers calculs}

%@Commande-1
{\MarqueCommandeGiac{1} \verb| 1/3+1/4;|}
{\MarqueLaTeXGiac{$\frac{7}{12}$}}
%@Commande-2
{\MarqueCommandeGiac{2} \verb| sqrt(2)^5;|}
{\MarqueLaTeXGiac{$\sqrt{2}2^{2}$}}
%@Commande-3
{\MarqueCommandeGiac{3} \verb| solve(a*x^2+b*x+c,x);|}
{\MarqueLaTeXGiac{$[\frac{(-b+\sqrt{-\left(4ac\right)+b^{2}})}{2a},\frac{(-b-\left(\sqrt{-\left(4ac\right)+b^{2}}\right))}{2a}]$}}
%@Commande-4
{\MarqueCommandeGiac{4} \verb| 50!|}
{\MarqueLaTeXGiac{$30414093201713378043612608166064768844377641568960512000000000000$}}
%@Commande-5
{\MarqueCommandeGiac{5} \verb| 2*a+b;|}
{\MarqueLaTeXGiac{$2a+b$}}
%@Commande-6
{\MarqueCommandeGiac{6} \verb| a/2*b;|}
{\MarqueLaTeXGiac{$\frac{a}{2} \times b$}}
%@Commande-7
{\MarqueCommandeGiac{7} \verb| a/2/b;|}
{\MarqueLaTeXGiac{$\frac{a}{2b}$}}
%@Commande-8
{\MarqueCommandeGiac{8} \verb| a^2*b;|}
{\MarqueLaTeXGiac{$a^{2}b$}}

%@Commande-9
{\MarqueCommandeGiac{9} \verb| sqrt(2);|}
{\MarqueLaTeXGiac{$\sqrt{2}$}}
%@Commande-10
{\MarqueCommandeGiac{10} \verb| evalf(sqrt(2));|}
{\MarqueLaTeXGiac{$1.414214$}}
%@Commande-11
{\MarqueCommandeGiac{11} \verb| sqrt(2)-evalf(sqrt(2));|}
{\MarqueLaTeXGiac{$0.000000$}}
%@Commande-12
{\MarqueCommandeGiac{12} \verb| exact(evalf(sqrt(2)))*10^9;|}
{\MarqueLaTeXGiac{$\frac{57121500000000}{40391}$}}
%@Commande-13
{\MarqueCommandeGiac{13} \verb| exact(evalf(sqrt(2)*10^9));|}
{\MarqueLaTeXGiac{$\frac{86487644620489}{61156}$}}

%@Commande-14
{\MarqueCommandeGiac{14} \verb| evalf(sqrt(2),50);|}
{\MarqueLaTeXGiac{$1.41421356237309504880168872420969807856967187537695$}}
%@Commande-15
{\MarqueCommandeGiac{15} \verb| evalf(pi,70);|}
{\MarqueLaTeXGiac{$3.1415926535897932384626433832795028841971693993751058209749445923078164$}}

%@Commande-16
{\MarqueCommandeGiac{16} \verb| Digits:=50;|}
{\MarqueLaTeXGiac{$[0,0,0,1,0, 0.000000,50,[1,50,0,25],0,0,0]$}}
%@Commande-17
{\MarqueCommandeGiac{17} \verb| evalf(pi);|}
{\MarqueLaTeXGiac{$3.14159265358979323846264338327950288419716939937510$}}
%@Commande-18
{\MarqueCommandeGiac{18} \verb| evalf(exp(pi*sqrt(163)));|}
{\MarqueLaTeXGiac{$0.262537412640768743999999999999250072597198185688719e18$}}

%@Commande-19
{\MarqueCommandeGiac{19} \verb| (1+2*i)^2;|}
{\MarqueLaTeXGiac{$-3+4*i$}}
%@Commande-20
{\MarqueCommandeGiac{20} \verb| (1+2*i)/(1-2*i);|}
{\MarqueLaTeXGiac{$\frac{-3+4*i}{5}$}}
%@Commande-21
{\MarqueCommandeGiac{21} \verb| e^(i*pi/3);|}
{\MarqueLaTeXGiac{$\left(2\right)^{-1}+\frac{i\sqrt{3}}{2}$}}

%@Commande-22
{\MarqueCommandeGiac{22} \verb| 1/0; (1/0)^2; -(1/0)^2;|}
{\MarqueLaTeXGiac{$\infty ,+\infty ,-\infty$}}

\section{Manipulation des chaînes de caractères}

%@Commande-23
{\MarqueCommandeGiac{23} \verb| s:="azertyuiop";|}
\begin{verbatim}		azertyuiop\end{verbatim}

%@Commande-24
{\MarqueCommandeGiac{24} \verb| size(s);|}
{\MarqueLaTeXGiac{$10$}}

%@Commande-25
{\MarqueCommandeGiac{25} \verb| s[0]+s[3]+s[size(s)-1];|}
\begin{verbatim}		arp\end{verbatim}

%@Commande-26
{\MarqueCommandeGiac{26} \verb| concat(s[0],concat(s[3],s[size(s)-1]));|}
\begin{verbatim}		arp\end{verbatim}

%@Commande-27
\begin{verbatim}		a\end{verbatim}

%@Commande-28
{\MarqueCommandeGiac{28} \verb| tail(s);|}
\begin{verbatim}		zertyuiop\end{verbatim}

%@Commande-29
{\MarqueCommandeGiac{29} \verb| mid(s,3,2);|}
\begin{verbatim}		rt\end{verbatim}

%@Commande-30
{\MarqueCommandeGiac{30} \verb| l:=asc(s);|}
{\MarqueLaTeXGiac{$[97,122,101,114,116,121,117,105,111,112]$}}

%@Commande-31
{\MarqueCommandeGiac{31} \verb| ss:=char(l);|}
\begin{verbatim}		azertyuiop\end{verbatim}

%@Commande-32
{\MarqueCommandeGiac{32} \verb| string(123);|}
\begin{verbatim}		123\end{verbatim}

%@Commande-33
{\MarqueCommandeGiac{33} \verb| expr(123);|}
{\MarqueLaTeXGiac{$\mbox{expr}\left(123\right)$}}

%@Commande-34
{\MarqueCommandeGiac{34} \verb| expr(0123);|}
{\MarqueLaTeXGiac{$\mbox{expr}\left(83\right)$}}

\section{Les variables}

%@Commande-35
{\MarqueCommandeGiac{35} \verb| a==b;|}
{\MarqueLaTeXGiac{$0$}}

%@Commande-36
{\MarqueCommandeGiac{36} \verb| a:=b;|}
{\MarqueLaTeXGiac{$b$}}

%@Commande-37
{\MarqueCommandeGiac{37} \verb| a==b;|}
{\MarqueLaTeXGiac{$1$}}

%@Commande-38
{\MarqueCommandeGiac{38} \verb| solve(a=b,a);|}
{\MarqueLaTeXGiac{$[b]$}}

%@Commande-39
{\MarqueCommandeGiac{39} \verb| solve(2*a=b+1,a);|}
{\MarqueLaTeXGiac{$[1]$}}

%@Commande-40
{\MarqueCommandeGiac{40} \verb| sqrt(a^2);|}
{\MarqueLaTeXGiac{$\mbox{abs}\left(b\right)$}}

%@Commande-41
{\MarqueCommandeGiac{41} \verb| assume(a<0);|}
{\MarqueLaTeXGiac{$a$}}

%@Commande-42
{\MarqueCommandeGiac{42} \verb| sqrt(a^2);|}
{\MarqueLaTeXGiac{$-a$}}

%@Commande-43
{\MarqueCommandeGiac{43} \verb| assume(n,integer);|}
{\MarqueLaTeXGiac{$DOM_INT$}}

%@Commande-44
{\MarqueCommandeGiac{44} \verb| sin(n*pi);|}
{\MarqueLaTeXGiac{$0$}}

%@Commande-45
{\MarqueCommandeGiac{45} \verb| subst(a^2+1,a=1);|}
{\MarqueLaTeXGiac{$2$}}

%@Commande-46
{\MarqueCommandeGiac{46} \verb| subst(a^2+1,a=sqrt(b-1));|}
{\MarqueLaTeXGiac{$b$}}

%@Commande-47
{\MarqueCommandeGiac{47} \verb| a^2+1;|}
{\MarqueLaTeXGiac{$a^{2}+1$}}

\end{document}