voidmy_func(void){char a; /* OK */char b; /* Wrong, variable with char type already exists */char a, b; /* OK */} 按顺序声明局部变量 i.自定义结构和枚举 ii.整数类型,更宽的无符号类型优先 iii.单/双浮点 intmy_func(void){/* 1 */my_struct_t my; /* First custo...
default使用不当 invalid indirection 无效的间接运算 invalid pointer addition 指针相加无效 irreducible expression tree 无法执行的表达式运算 lvalue required 需要逻辑值0或非0值 macro argument syntax error 宏参数语法错误 macro expansion too long 宏的扩展以后太长 mismatched number of parameters in definition ...
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 implement semicolon */ SET_POINT(&p, 3, 4); /* Set point to position 3...
分析:一般是头文件未用一对双引号或尖括号括起来,例如“#include stdio.h” error C2007: #define syntax 中文对照:(编译错误)#define语法错误 分析:例如“#define”后缺少宏名,例如“#define” error C2008: ‘xxx’ : unexpected in macro definition 中文对照:(编译错误)宏定义时出现了意外的xxx 分析:宏...
To inner `if` statement when we check `b` condition * Actual answer: Compilation error as `else` belongs nowhere */ /* Better and correct implementation of macro */ #define SET_POINT(p, x, y) do { (p)->px = (x); (p)->py = (y); } while (0) /* 2 statements. No semic...
在 React 中,一些 HTML 元素,比如 input 和 textarea,具有 onChange 事件。onChange 事件是一个非常有用、非常常见的事件,用于捕获输入框中的文本变化。有时候,我们需要将多个参数同时传递给 onChange 事件处理函数,在本文中,我们将介绍如何实现这一目标。
4、g ;说明缺少 ""Declaration syntax error说明中出现语法错误Default outside of switchDefault 出 现在 switch 语句之外Define directive needs an identifier定义编 译预处理需要标识符Division by zero 用零作除数Do statement must have whileDo-while 语 句中缺少 while 部分Enum syntax error枚举类型语法 错误...
macro-arguments" #endif // Francesco Pretto (ceztko) --> https://stackoverflow.com/a/26685339/2706707 #ifdef _MSC_VER // Microsoft compilers #define DUTHOMHAS_EXPAND(x) x #define DUTHOMHAS_NARGS_0(_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12,_13,_14,_15,_16,_17,_18,...
I have some confusions about that macro and need some help there to understand. Since the original code is very long, I just take out the part which I have question about: The following is simplified code snippet which I have questions about: #define OP1(ptr, save, rail) \ do { \ ...
注意:如果是智能设备程序出现此错误,应该确保resourceppc.h和Resourceppc.h中都有相同的宏定义#define IDD_DIALOG1 XXX,并且在dialog.cpp中包含资源头文件resourceppc.h === 2、error C2471: 无法更新程序数据库 ,fatal error C1083: 无法打开程序数据库文件 error C2471...