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分享这样的定义是什么意思啊
extern "C"
{
#include "jpeglib.h"
#include "GIFCodec\gif.h"
#include "libpng\png.h"
#include "GIFCodec\bitstr.h"
}
以前没见过 为什么这样定义啊 有什么作用 望高手解答
{
#include "jpeglib.h"
#include "GIFCodec\gif.h"
#include "libpng\png.h"
#include "GIFCodec\bitstr.h"
}
以前没见过 为什么这样定义啊 有什么作用 望高手解答
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半醉看夕阳 2013-04-20
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这个我也是第一次看到,坐等高手解释下吧
Carl_CCC 2013-04-20
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这个出现在C++里，提醒编译器，请保持我的名称，不要给我生成用于链接的中间函数名。这样就能避免C的代码出现问题。
renyaoming2020 2013-04-20
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自己查msdn
normal_gcg 2013-04-20
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msdn在哪下啊？这种情况我也是第一次见
SKATE11 2013-04-20
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有没有简洁点的中文表达啊
赵4老师 2013-04-20
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查MSDN是Windows程序员必须掌握的技能之一。
Mixed-Language Programming with C++
Home | Overview | How Do I
C++ uses the same calling convention and parameter-passing techniques as C, but naming conventions are different because of C++ decoration of external symbols. By causing C++ to drop name decoration, the extern "C" syntax makes it possible for a C++ module to share data and routines with other languages.
The following example declares prn as an external function using the C naming convention. This declaration appears in C++ source code.
extern "C"
{
void prn();
}
To call functions written in Fortran (or MASM), declare the function as you would in C and use a "C" linkage specification. For example, to call the Fortran function FACT from C++, declare it as follows:
extern "C" { int __stdcall FACT( int n ); }
The extern "C" syntax can be used to adjust a call from C++ to other languages, or to change the naming convention of C++ routines called from other languages. However, extern "C" can be used only from within C++. If the C++ code does not use extern "C" and cannot be changed, you can call C++ routines only by determining the name decoration and generating it from the other language. You can always determine the decoration by using the DUMPBIN utility. Use this approach only as a last resort, because the decoration scheme is not guaranteed to remain the same between versions.
Use of extern "C" has some restrictions:
You cannot declare a member function with extern "C".
You can specify extern "C" for only one instance of an overloaded function; all other instances of an overloaded function have C++ linkage.
For more information on the extern "C" linkage specification, see Linkage Specifications in C++ Language Reference.
情歌王子 2013-04-20
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我感觉这是指向头文件路径的地址，便于寻找并精确确定头文件。
