c macro define if
, See http://gcc.gnu.org/onlinedocs/cpp/If.html#If ... Note that if choice is not #defined , the compiler (preprocessor) treats it as having the value 0 ., The c preprocessor only works on integer constant expressions in its conditionals. If you give it tokens it can't expand (such as first or second ..., #If指示詞，搭配#elif， #else，以及#endif指示詞，控制項的原始程式檔部分編譯。 ... 巨集取代會在命令列後面的部分#elif命令，因此可以使用巨集呼叫常數運算式。 .... C 複製. #if defined(CREDIT) credit(); #elif defined(DEBIT) debit(); ..., You can simulate conditionals using macro token concatenation as follows: #define DEF_CONST(b_const) DEF_CONST_##b_const #define ..., #if defined(MACRO) is the same as #ifdef MACRO , but is longer. ... are (or can be) C/C++ values and the pre-processor doesn't have access to ..., You can not use if statement, because #define is interpret by the preprocessor, and .... Typecasting to double necessary, since int/int == int in C.,controlled text will be included in the output of the preprocessor if and only if MACRO is defined. We say that the conditional succeeds if MACRO is defined, fails if it is not. ... In other words, ' #endif ' always matches the nearest ' #ifde,由於前置處理器部分的程式碼是巨集而非真正的C 程式碼，所以可以用來做一些原本 ... #define compare(a, b) - bool cmp = 0; - if ((a) > (b)) - cmp = 1; - } else if ((a) ... ,in C/C++ on 2014-07-14. 關於macro的介紹，有一個還不錯的網站。 在debug的時候很常用printf ... #define print_var(var) printf("%s: %s-n", #var, var) //也可以這樣 #define ... 加上do while是為了有分號。 if (a>0) SWAP(a,b); else SWAP(a,b);.
| 相關軟體 IntelliType Pro 資訊 | |
|---|---|
 c macro define if 相關參考資料
4.2.1 Ifdef - GCC, the GNU Compiler Collection - Gnu.org
https://gcc.gnu.org C macro: #if check for equality - Stack Overflow
See http://gcc.gnu.org/onlinedocs/cpp/If.html#If ... Note that if choice is not #defined , the compiler (preprocessor) treats it as having the value 0 . https://stackoverflow.com Defining C macros in preprocessor if statements - Stack Overflow
The c preprocessor only works on integer constant expressions in its conditionals. If you give it tokens it can't expand (such as first or second ... https://stackoverflow.com else 和#endif 指示詞(C C++) - Microsoft Docs
#If指示詞，搭配#elif， #else，以及#endif指示詞，控制項的原始程式檔部分編譯。 ... 巨集取代會在命令列後面的部分#elif命令，因此可以使用巨集呼叫常數運算式。 .... C 複製. #if defined(CREDIT) credit(); #elif defined(DEBIT) debit(); ... https://docs.microsoft.com How to use #if inside #define in the C preprocessor? - Stack Overflow
You can simulate conditionals using macro token concatenation as follows: #define DEF_CONST(b_const) DEF_CONST_##b_const #define ... https://stackoverflow.com Is #if defined MACRO equivalent to #ifdef MACRO? - Stack Overflow
#if defined(MACRO) is the same as #ifdef MACRO , but is longer. ... are (or can be) C/C++ values and the pre-processor doesn't have access to ... https://stackoverflow.com Is it possible to use a if statement inside #define? - Stack Overflow
You can not use if statement, because #define is interpret by the preprocessor, and .... Typecasting to double necessary, since int/int == int in C. https://stackoverflow.com The C Preprocessor: Ifdef - GCC, the GNU Compiler Collection
controlled text will be included in the output of the preprocessor if and only if MACRO is defined. We say that the conditional succeeds if MACRO is defined, fails if it is not. ... In other words, &#... http://gcc.gnu.org [C 語言] 程式設計教學：如何使用巨集(macro) 或前置處理器 ...
由於前置處理器部分的程式碼是巨集而非真正的C 程式碼，所以可以用來做一些原本 ... #define compare(a, b) - bool cmp = 0; - if ((a) > (b)) - cmp = 1; - } else if ((a) ... https://michaelchen.tech 用macro的技巧| 技術筆記
in C/C++ on 2014-07-14. 關於macro的介紹，有一個還不錯的網站。 在debug的時候很常用printf ... #define print_var(var) printf("%s: %s-n", #var, var) //也可以這樣 #define ... 加上do while是為了有分號。 if (a>0) SWAP(a,b); else SW... http://twmht.github.io |