root@ubuntu-virtual-machine:/home/ubuntu# gcc b.c b.c:2:27: error: missing ')' in macro parameter list #define Variable_Macro(...,a) printf(__VA_ARGS__) ^ 1. 2. 3. 4. 你点的每个赞,我都当成喜欢
最重要的一点是:Macro不是类型安全的,这严重破坏了C++的强类型特征。 然后,宏不会出现在编译器生成的中间源代码中(它在编译初期预处理阶段就已经被替换掉了),因此难以调试。 而且,虽然简便,但大型宏非常难以管理(虽然可以用\扩展到下一行)。 最后,也并不重要,宏是C风格,不是C++风格。 建议大家看一下我的这篇...
(1). 使用函数 PrintSourceInfo(),无论 Debug/Release 方式编译,无论是否 inline 化 PrintSourceInfo(),输出结果相同,均是 MacroTest.h 的信息: File: d:\source\macrotest\macrotest.h, Line: 64, Date: Aug 28 2011, Time: 06:43:59, Timestamp: Sun Aug 28 06:43:57 2011, ANSI/ISO C: NO,...
Use in main routine : void main() { Delay(); // Delay 3000 Machine Cycles } => For easier use, i should write a DelayMCs() Macro, eg : #define DelayMCs(Interval) //Code Here??? Then, use this Macro like this : void main() { DelayMCs(7000); } => That's my idea. ...
C语言之在#define中使用参数 Parts of a function-like macro definition 下面是一个类函数宏的示例: #define SQUARE(X) X*X 在程序中可以这样用: z = SQUARE(2); 这看上去像函数调用,但是它的行为和函数调用完全不同。程序macarg.c 演示了类函数宏和另一个宏的用法。该示例中有一些陷阱,请读者仔细阅读...
For more information, see c89 — Compiler invocation using host environment variables or xlc — Compiler invocation using a customizable configuration file.Predefined macros To use the __STRING_CODE_SET__ macro to change the code page that the compiler uses for character string literals, you must...
Define a Macro:define macroName { script}Macros can take up to five arguments. Use the %1, %2, %3, etc., notation within the script to indicate that the macro expects one or more arguments. A macro can accept a number, string, variable, dataset, function, or script as an argument,...
C // Macro to define cursor lines#defineCURSOR(top, bottom) (((top) << 8) | (bottom))// Macro to get a random integer with a specified range#definegetrandom(min, max) \ ((rand()%(int)(((max) + 1)-(min)))+ (min)) ...
Print("MACRO is defined in ",__FUNCTION__); #else Print("MACRO is not defined in ",__FUNCTION__); #endif } #undef MACRO void func2() { #ifdef MACRO Print("MACRO is defined in ",__FUNCTION__); #else Print("MACRO is not defined in ",__FUNCTION__); #endif } void OnStart...
>In C++, I can define a macro such as: >#define PRODUCT(x, y, z) x * y * z >and then use it in code: >int a = SUM(3, 2, 1); >C# doesn't allow you to do this. Why? Neither does C++. You did not define any SUM() function or macro. :> Zinoblog 2004年3月10...