VS中如何去掉字符串操作函数的警告信息 _CRT_SECURE_NO_DEPRECATE

使用VS2005以上版本(VS2005、VS2008、VS2010)编译在其他编译器下正常通过的C语言程序,你可能会遇到类似如下的警告提示:
 引用内容
warning C4996: 'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.

意思就是说推荐用它的安全版本,以往的项目移植过来会有很多这种信息,上网找了一些方法都不太好用,非常烦人,那么如何禁用掉呢?

Project -> Properties  -> C/C++ -> Command Line

加入

【/D "_CRT_SECURE_NO_DEPRECATE"】(加入中括号中的全部内容)


原因解释
这种微软的警告,主要因为那些C库的函数,很多函数内部是不进行参数检测的(包括越界类的),微软担心使用这些会造成内存异常,所以就改写了同样功能的函数,改写了的函数进行了参数的检测,使用这些新的函数会更安全和便捷。关于这些改写的函数你不用专门去记忆,因为编译器对于每个函数在给出警告时,都会告诉你相应的安全函数,查看警告信息就可以获知,在使用时也再查看一下MSDN详细了解。

/* Copyright (c) 2009-2017 Dave Gamble and cJSON contributors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /* cJSON */ /* JSON parser in C. */ /* disable warnings about old C89 functions in MSVC */ #if !defined(_CRT_SECURE_NO_DEPRECATE) && defined(_MSC_VER) #define _CRT_SECURE_NO_DEPRECATE #endif #ifdef __GNUC__ #pragma GCC visibility push(default) #endif #if defined(_MSC_VER) #pragma warning (push) /* disable warning about single line comments in system headers */ #pragma warning (disable : 4001) #endif #include <string.h> #include <stdio.h> #include <math.h> #include <stdlib.h> #include <float.h> #include <limits.h> #include <ctype.h> #ifdef ENABLE_LOCALES #include <locale.h> #endif #if defined(_MSC_VER) #pragma warning (pop) #endif #ifdef __GNUC__ #pragma GCC visibility pop #endif #include "JSON.h" /* define our own boolean type */ #define true ((cJSON_bool)1) #define false ((cJSON_bool)0) typedef struct { const unsigned char *json; size_t position; }
最新发布
04-03
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