macro function和macro的区别 function和macro的优缺点以及使用场景 总结 介绍 CMake简介 CMake是一个开源的跨平台构建工具,它可用于生成可定制的构建过程,如Makefiles、Visual Studio项目或Xcode项目。CMake使用CMakeLists.txt文件来描述构建过程,这些文件包含了构建项目所需的
使用do-while(0)语句保护它typedefstruct {int32_t px, py;} point_t;point_t p; /* Define new point *//* Wrong implementation *//* Define macro to set point */#define SET_POINT(p, x, y) (p)->px = (x); (p)->py = (y) /* 2 statements. Last one should not implem...
WriteFile fails with ERROR_INVALID_FUNCTION (0x1) Writing to the end of a file with CreateFile wstring to lpwstr xkeycheck.h and macro defined keywords XRANDR for Windows XSD : error : The CodeDom provider type "Microsoft.VisualC.CppCodeProvider, CppCodeProvider could not be located. XSD :...
#define SUM(x, y) ((x) + (y)) 当宏使用多个语句时,使用do-while(0)语句保护它 typedef struct { int32_t px, py; } point_t; point_t p; /* Define new point */ /* Wrong implementation */ /* Define macro to set point */ #define SET_POINT(p, x, y) (p)->px = (x); (...
We can use macros to define the MIN and MAX functions in the C language. A macro is a code segment used to define variable values and functions. When we call a macro, it gets replaced by its value or function. For example, we can define the value of a variable like PI, and when ...
}/* When d should not be modified inside function, only data pointed to by d could be modified */voidmy_func(void*constd) { } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 当函数可以接受任何类型的指针时,总是使用void *,不要使用uint8_t *。函数在实现时必...
voida(void){/* Avoid function calls when declaring variable */int32_t a,b=sum(1,2);/* Use this */int32_t a,b;b=sum(1,2);/* This is ok */uint8_t a=3,b=4;} 除了char、float或double之外,始终使用stdint.h标准库中声明的类型。例如,8位的uint8_t等 ...
unless the second definitionis a function-like macro definition that has the same number and spelling ofparameters, and the two replacement lists are identical. 问题2:宏的参数(形参)会被替换吗? 先举个例子说明这个问题: #definefoo 1#definebar(foo) foo + 2bar(a) ...
Im trying to add assembly code inside a C function using: #pragma ASM //asembly code #pragma ENDASM i also add the SCR directive for the Cx51
Some command names require arguments; these make up the rest of the command line and must be separated from the command name by whitespace. For example,`#define'must be followed by a macro name and the intended expansion of the macro. ...