我正在使用C语言编写一个简单的应用程序,希望以BSD许可证发布。该应用程序的其中一部分负责向用户打印有关程序的信息。然而,我在打印许可证文本时遇到了问题。以下是示例:
#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;
}
我在Kubuntu 13.10上使用gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.11
编译我的应用程序时,收到了以下警告信息:
warning: unknown escape sequence: '\040' [enabled by default]
const char *license = "\n\
^
我该怎么解决这个问题?我向自己承诺要写出一份没有任何警告和错误的代码。这是一份纯C应用程序。
编辑:
谢谢大家,这里是没有警告的正常工作代码:
#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;
}
\\
字符只会导致不将许可证文本作为整个文本来打印。 - yak\\[Enter]
",所以实际上并没有帮助(已尝试)。 - yak