__FUNCTION__是在 GNU C 中定义的名称,因为 远古; 由 C 标准定义。 使用以下条件,您可以使用定义的任一条件。__func__ #if__STDC_VERSION__< 199901L # if__GNUC__>= 2 # define __func__ __FUNCTION__ # else # define __func__ "<unknown>" # endif #e
1, Macro definition: Some macros can be defined in the header file, which is convenient to use in different source files. For example, we can define a macro that represents the size of an array in a header file and then reference this macro in other source files to improve the ...
问设置/理解在头文件中使用#define的方式(从cmakelist设置)ENNSString *url = HOST_GAME; AFHTTP...
In C programming, header files serve as a way to declare function prototypes, types, and macros that can be shared across multiple source files. The syntax of header files typically consists of the following elements: #ifndef HEADER_NAME_H#define HEADER_NAME_H // Declarations and definitions ...
The function accepts an input signal argument, a parameter argument, and an output signal argument. Copy this custom header code into a file named ex_myTypes_LCT.h in your current folder. <include>ex_myTypes_LCT.h</include> The file defines the signal and parameter str...
如果将任何预处理器指令(例如#include、#define或#pragma)放在预编译头文件的#include之前,则可能会发生此错误。 如果源文件使用预编译头文件(即,如果该文件是使用/Yu编译器选项编译的),则会忽略预编译头文件之前的所有预处理器指令。 此示例无法编译,因为cout和endl是在<iostream>标头中定义的,而该标头包含在预编...
and you use ABD_Type in a header (or anywhere else), you need to include that header file too: /* File XYZ.h */ #ifndef XYZ_H_ #define XYZ_H_ #include "ABC.h" /* include this header, as we are using content of ABC.h below! */ void XYZ_foo(ABC_Typ...
Write the header file myMult2.h. Save it in mycfiles. #if !defined(MYMULT2) #define MYMULT2 extern double myMult2(double); #endif Write a MATLAB function, myfunc, that includes myMult2.h and calls myMult2 for code generation only. function y = myfunc %#codegen y = 21; if ~cod...
The S-function csfunc.c begins with #define statements for the S-function name and level, and a #include statement for the simstruc.h header. After these statements, the S-function can include or define any other necessary headers, data, etc. The csfunc.c example defines the variable U ...
void h(void) { char name[] = __FUNCTION__; f( name); void *p = &""; } C++11 UDL 字串 下列程式碼現在會產生錯誤 C3688︰常值後置字元 'L' 無效; 找不到常值運算子或常值運算子範本 'operator ""L' C++ 複製 #define MACRO #define STRCAT(x, y) x\#\#y int main(){ auto *...