https://code-reference.com/ 2026-06-21T07:52:55+02:00 https://code-reference.com/ https://code-reference.com/ttps://code-reference.com/lib/tpl/dokuwiki/images/favicon.ico text/html 2013-01-24T20:08:54+02:00 https://code-reference.com/c/preprocessor/%23define?rev=1359054534&do=diff syntax /* define a symbolic constant */ #define identifier replacement list /* define a Macro */ #define identifier (identifier_list) replacement list description The #define directive replaces any additional occurrences of identifier in the source code by the specified list as a replacement string. This replacement affects only terminal symbols (ie independent occurrence of identifier in the source code), but not strings that appear in a comment section of another identifier or part of a … text/html 2024-02-16T01:06:07+02:00 https://code-reference.com/c/preprocessor/%23elif?rev=1708041967&do=diff description of elif elif is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of elif c example no example at the moment text/html 2024-02-16T01:06:07+02:00 https://code-reference.com/c/preprocessor/%23else?rev=1708041967&do=diff description of else else is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of else c example no example at the moment text/html 2024-02-16T01:06:07+02:00 https://code-reference.com/c/preprocessor/%23endif?rev=1708041967&do=diff description of endif endif is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of endif c example no example at the moment text/html 2013-10-23T16:23:04+02:00 https://code-reference.com/c/preprocessor/%23error?rev=1382538184&do=diff #error your error_message description of error The #error directive emits a user-specified error message at compile time and then terminates the compilation. The following code will cause in compilation error: #include<stdio.h> int main() { printf("code-reference.com/c"); return 0; } #if !defined(PASS_COMPILER) #error Syntax to Pass this stage is required ! #endif text/html 2024-02-16T01:06:08+02:00 https://code-reference.com/c/preprocessor/%23if?rev=1708041968&do=diff description of if if is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of if c example no example at the moment text/html 2024-02-16T01:06:08+02:00 https://code-reference.com/c/preprocessor/%23ifdef?rev=1708041968&do=diff description of ifdef ifdef is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of ifdef c example no example at the moment text/html 2024-02-16T01:06:06+02:00 https://code-reference.com/c/preprocessor/%23ifndef?rev=1708041966&do=diff description of ifndef ifndef is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of ifndef c example no example at the moment text/html 2024-02-16T01:06:07+02:00 https://code-reference.com/c/preprocessor/%23include?rev=1708041967&do=diff #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ #include "myheader.h" description include a file into your c sourcecode C Example 1 #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main(void){ printf("the answer to life the universe and everything is %d \n", 42 ); } text/html 2024-02-16T01:06:06+02:00 https://code-reference.com/c/preprocessor/%23pragma?rev=1708041966&do=diff description of pragma pragma is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of pragma c example no example at the moment text/html 2024-02-16T01:06:08+02:00 https://code-reference.com/c/preprocessor/%23undef?rev=1708041968&do=diff Description With the # undef a macro can be overridden. Status “defined” or “undefined” is an important characteristic of an identifier, regardless of its actual definition. The # ifdef and # ifndef can be used to check whether an identifier is currently defined or not. text/html 2024-02-16T01:06:06+02:00 https://code-reference.com/c/preprocessor/%23warning?rev=1708041966&do=diff description of warning warning is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of warning c example no example at the moment text/html 2013-01-24T20:08:54+02:00 https://code-reference.com/c/preprocessor/define?rev=1359054534&do=diff syntax /* define a symbolic constant */ #define identifier replacement list /* define a Macro */ #define identifier (identifier_list) replacement list description The #define directive replaces any additional occurrences of identifier in the source code by the specified list as a replacement string. This replacement affects only terminal symbols (ie independent occurrence of identifier in the source code), but not strings that appear in a comment section of another identifier or part of a … text/html 2024-02-16T01:06:07+02:00 https://code-reference.com/c/preprocessor/elif?rev=1708041967&do=diff description of elif elif is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of elif c example no example at the moment text/html 2024-02-16T01:06:07+02:00 https://code-reference.com/c/preprocessor/else?rev=1708041967&do=diff description of else else is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of else c example no example at the moment text/html 2024-02-16T01:06:07+02:00 https://code-reference.com/c/preprocessor/endif?rev=1708041967&do=diff description of endif endif is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of endif c example no example at the moment text/html 2013-10-23T16:23:04+02:00 https://code-reference.com/c/preprocessor/error?rev=1382538184&do=diff #error your error_message description of error The #error directive emits a user-specified error message at compile time and then terminates the compilation. The following code will cause in compilation error: #include<stdio.h> int main() { printf("code-reference.com/c"); return 0; } #if !defined(PASS_COMPILER) #error Syntax to Pass this stage is required ! #endif text/html 2024-02-16T01:06:08+02:00 https://code-reference.com/c/preprocessor/if?rev=1708041968&do=diff description of if if is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of if c example no example at the moment text/html 2024-02-16T01:06:08+02:00 https://code-reference.com/c/preprocessor/ifdef?rev=1708041968&do=diff description of ifdef ifdef is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of ifdef c example no example at the moment text/html 2024-02-16T01:06:06+02:00 https://code-reference.com/c/preprocessor/ifndef?rev=1708041966&do=diff description of ifndef ifndef is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of ifndef c example no example at the moment text/html 2024-02-16T01:06:07+02:00 https://code-reference.com/c/preprocessor/include?rev=1708041967&do=diff #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ #include "myheader.h" description include a file into your c sourcecode C Example 1 #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main(void){ printf("the answer to life the universe and everything is %d \n", 42 ); } text/html 2024-02-16T01:06:06+02:00 https://code-reference.com/c/preprocessor/pragma?rev=1708041966&do=diff description of pragma pragma is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of pragma c example no example at the moment text/html 2024-02-16T01:06:08+02:00 https://code-reference.com/c/preprocessor/undef?rev=1708041968&do=diff Description With the # undef a macro can be overridden. Status “defined” or “undefined” is an important characteristic of an identifier, regardless of its actual definition. The # ifdef and # ifndef can be used to check whether an identifier is currently defined or not. text/html 2024-02-16T01:06:06+02:00 https://code-reference.com/c/preprocessor/warning?rev=1708041966&do=diff description of warning warning is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of warning c example no example at the moment