\documentclass[french]{book}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[a4paper]{geometry}
\usepackage{babel}
\usepackage{listings}
\lstset{language=C}
\author{Alexis Jeandet}
\date{October 2011}