avertissement: inconnu séquence d'échappement: '\040' [activé par défaut]

Je suis en train d'écrire une application simple en C, ce qui, je tiens à publier sous licence BSD. Une partie de l'application est responsable de l'impression des informations sur le programme de ses utilisateurs. Cependant, j'ai un problème avec l'impression du texte de la licence. Voici l'exemple:

#include <stdio.h>
#include <stdlib.h>

void show_license(void)
{
    const char *license = "\n\
 Copyright (c) 2012 \n\
 All rights reserved.\n\
 \"Redistribution and use in source and binary forms, with or without\n\
 modification, are permitted provided that the following conditions are\n\
 met:\n\
\n\
   * Redistributions of source code must retain the above copyright\n\
     notice, this list of conditions and the following disclaimer.\n\
   * Redistributions in binary form must reproduce the above copyright\n\
     notice, this list of conditions and the following disclaimer in\n\
     the documentation and/or other materials provided with the\n\
     distribution.\n\
   * Neither the name of XXX and its Subsidiary(-ies) nor the names\n\
     of its contributors may be used to endorse or promote products derived\n\
     from this software without specific prior written permission.\n\
\n\
\n\
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n\
 \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n\
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n\
 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n\
 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n\
 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n\
 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n\
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n\
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n\
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n\
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\"\n\
\n\
\n\ \n";

    fputs("\n", stderr);
    fputs(license, stderr);
    fputs("\n", stderr);
}


int main()
{
    show_license();
    return 0;
}

- Je compiler mon application en utilisant gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.11 sur Kubuntu 13.10. J'ai eu ce message d'avertissement:

warning: unknown escape sequence: '0' [enabled by default]
     const char *license = "\n\
                           ^

Comment puis-je me débarrasser de lui? J'ai promis à moi-même d'écrire un code sans erreurs et avertissements. C'est une simple application C.

EDIT:

Merci à vous tous, voici le bon de travail, les mises en garde-gratuit code:

#include <stdio.h>
#include <stdlib.h>

void show_license(void)
{
    const char *license = "\n \
 Copyright (c) 2012 \n\
 All rights reserved.\n\
 \"Redistribution and use in source and binary forms, with or without\n\
 modification, are permitted provided that the following conditions are\n\
 met:\n\
\n\
   * Redistributions of source code must retain the above copyright\n\
     notice, this list of conditions and the following disclaimer.\n\
   * Redistributions in binary form must reproduce the above copyright\n\
     notice, this list of conditions and the following disclaimer in\n\
     the documentation and/or other materials provided with the\n\
     distribution.\n\
   * Neither the name of XXX and its Subsidiary(-ies) nor the names\n\
     of its contributors may be used to endorse or promote products derived\n\
     from this software without specific prior written permission.\n\
\n\n\
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n\
 \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n\
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n\
 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n\
 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n\
 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n\
 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n\
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n\
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n\
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n\
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\"\n\
\n\n\n";

    fputs("\n", stderr);
    fputs(license, stderr);
    fputs("\n", stderr);
}


int main()
{
    show_license();
    return 0;
}
  • Avez-vous googlé "séquence d'échappement 040"?
  • Oui, je l'ai fait, mais l'ajout d'un autre caractère `\` simplement des résultats dans le pas-de traiter le texte de la licence de l'ensemble du texte à imprimer
  • Avez-vous des "\[espace]" à la fin d'une ou plusieurs lignes? Essayez cette réponse bytes.com/topic/c/answers/... Si oui, remplacer "\ " par "\" qui indique au compilateur pour continuer le sens littéral du texte sur la ligne suivante.
  • Je n'ai pas d'espace à la fin, juste "\\[Enter]", donc il ne m'a pas fait (essayé)
InformationsquelleAutor yak | 2014-12-28