구차니의 잡동사니 모음

    hInst = LoadLibrary("SmallDll.dll");

    if(hInst == NULL)

        return 1;

    // 호출한 함수를 맵핑

    fAPlusB = (APlusB)GetProcAddress(hInst, "APlusB");

    fAMinusB = (AMinusB)GetProcAddress(hInst, "AMinusB"); 

HMODULE WINAPI LoadLibrary(

  _In_ LPCTSTR lpFileName

);

FARPROC WINAPI GetProcAddress(

  _In_ HMODULE hModule,

  _In_ LPCSTR  lpProcName

);

// MathFuncsDll.h

#ifdef MATHFUNCSDLL_EXPORTS

#define MATHFUNCSDLL_API __declspec(dllexport) 

#else

#define MATHFUNCSDLL_API __declspec(dllimport) 

#endif

// MyExecRefsDll.cpp

// compile with: /EHsc /link MathFuncsDll.lib 

If you are familiar with C++ and macros, then

#import "Class.h" 

is similar to

{

#pragma once

#include "class.h"

}

[링크 : http://stackoverflow.com/.../what-is-the-difference-between-import-and-include-in-objective-c] 

$ cat sp.c

#include <stdio.h>

#include <omp.h>

int main(int argc, char **argv)

{

        int a = 0;

        for(;;)

        {

        a++;

//      printf("%d ",a);

        printf("%d\n",a);

        }

        return 0;

}

$ gcc -fopenmp -o b.out sp.c 

$ sudo apt-get install cppcheck

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following extra packages will be installed:

  libtinyxml2.6.2

The following NEW packages will be installed:

  cppcheck libtinyxml2.6.2

0 upgraded, 2 newly installed, 0 to remove and 81 not upgraded.

Need to get 604 kB of archives.

After this operation, 1,466 kB of additional disk space will be used.

Do you want to continue [Y/n]?

Get:1 http://archive.ubuntu.com/ubuntu/ precise/universe libtinyxml2.6.2 amd64 2                                      .6.2-1build1 [35.3 kB]

Get:2 http://archive.ubuntu.com/ubuntu/ precise/universe cppcheck amd64 1.52-1 [                                      569 kB]

Fetched 604 kB in 2s (225 kB/s)

Selecting previously unselected package libtinyxml2.6.2.

(Reading database ... 213921 files and directories currently installed.)

Unpacking libtinyxml2.6.2 (from .../libtinyxml2.6.2_2.6.2-1build1_amd64.deb) ...

Selecting previously unselected package cppcheck.

Unpacking cppcheck (from .../cppcheck_1.52-1_amd64.deb) ...

Processing triggers for man-db ...

Setting up libtinyxml2.6.2 (2.6.2-1build1) ...

Setting up cppcheck (1.52-1) ...

Processing triggers for libc-bin ...

ldconfig deferred processing now taking place 

Example usage:

  # Recursively check the current folder. Print the progress on the screen and

    write errors to a file:

    cppcheck . 2> err.txt

  # Recursively check ../myproject/ and don't print progress:

    cppcheck --quiet ../myproject/

  # Check only files one.cpp and two.cpp and give all information there is:

    cppcheck -v -s one.cpp two.cpp

  # Check f.cpp and search include files from inc1/ and inc2/:

    cppcheck -I inc1/ -I inc2/ f.cpp

For more information:

    http://cppcheck.sf.net/manual.pdf

$ gcc -v

Using built-in specs.

COLLECT_GCC=gcc

COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper

Target: x86_64-linux-gnu

Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu

Thread model: posix

gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) 

$ vi void.c

#include <stdio.h>

void main()

{

        void *fp;

        int a = 0;

        fp = &a;

        printf("sizeof(void) %d\n",sizeof(void));

        fp++;

        printf("fp %8X\n",fp);

} 

$ gcc void.c

void.c: In function ‘main’:

void.c:9:2: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat]

void.c:10:2: warning: format ‘%X’ expects argument of type ‘unsigned int’, but argument 2 has type ‘void *’ [-Wformat]

void.c:12:2: warning: format ‘%X’ expects argument of type ‘unsigned int’, but argument 2 has type ‘void *’ [-Wformat]

6.23 Arithmetic on void- and Function-Pointers

In GNU C, addition and subtraction operations are supported on pointers to void and on pointers to functions. This is done by treating the size of a void or of a function as 1.

A consequence of this is that sizeof is also allowed on void and on function types, and returns 1.

The option -Wpointer-arith requests a warning if these extensions are used.

[링크 : https://gcc.gnu.org/onlinedocs/gcc/Pointer-Arith.html]

Compiler Error CS0242

The operation in question is undefined on void pointers

Incrementing a void pointer is not allowed. For more information, see Unsafe Code and Pointers (C# Programming Guide).

[링크 : https://msdn.microsoft.com/en-us/library/dhyat531(v=vs.90).aspx] 

#include <stdio.h>

int printf(const char *format, ...);

int fprintf(FILE *stream, const char *format, ...);

int sprintf(char *str, const char *format, ...);

int snprintf(char *str, size_t size, const char *format, ...);

#include <stdarg.h>

int vprintf(const char *format, va_list ap);

int vfprintf(FILE *stream, const char *format, va_list ap);

int vsprintf(char *str, const char *format, va_list ap);

int vsnprintf(char *str, size_t size, const char *format, va_list ap);

[링크 : http://linux.die.net/man/3/vsprintf]