syntax

c 常见错误

由 家住魔仙堡 提交于 2020-02-10 07:48:50
."c" not an argument in function sum 该标识符不是函数的参数 2.array bounds missing ] in function main 缺少数组界限符 "]" 3.Array size too large in function main 数组规模太大 4.bad file name format in include directive 在包含指令中的文件名格式不正确. 5.Call of non-function in function main 调用未经过定义的函数. 6.cannot modify a const object in function main 对常量不能进行修改. 7.character constant too long in function main 字符常量太大 8.constant expression required in funtion main 数组定义的时候,数组大小要求是常数 9.compound statment missing } in function main 复合语句漏掉符号 "{" 10.declaration syntax error in function main 宣告语法错误 11.expression syntax in function main 表达式语法错误

C++ syntax: void CLASS functionName()?

由 吃可爱长大的小学妹 提交于 2020-02-08 07:20:46
问题 I came across some standalone code without headers. I believe it to be straight C/C++, but am not sure. If so, what does the "CLASS" in the following mean? I know it's not a class declaration or definition. Is this a method of a class named "CLASS"? void CLASS functionName(){ // // // } I'm used to seeing <returnType> <functionName>() {...} , but not the above. Am I forgetting something? (Pardon me, as I've been in JS and Objective-C lately.) 回答1: Although it's not common AFAIK, it could be

C++ syntax: void CLASS functionName()?

由 |▌冷眼眸甩不掉的悲伤 提交于 2020-02-08 07:20:10
问题 I came across some standalone code without headers. I believe it to be straight C/C++, but am not sure. If so, what does the "CLASS" in the following mean? I know it's not a class declaration or definition. Is this a method of a class named "CLASS"? void CLASS functionName(){ // // // } I'm used to seeing <returnType> <functionName>() {...} , but not the above. Am I forgetting something? (Pardon me, as I've been in JS and Objective-C lately.) 回答1: Although it's not common AFAIK, it could be

Access - Get latest date if column contains value from another one

由 北战南征 提交于 2020-02-06 08:45:29
问题 I'm having an issue with a VBA function for my query in Access. I have a table " tbldata " Equipment Last Inspection 420-413 2019-06-15 440-433 2019-06-15 402-483 2019-06-29 420-413 2019-12-12 and a query " qryunpair " UnpairEquipment 420 413 440 433 402 483 What I'm trying to achieve is: Equipment Latest Date 420 2019-12-12 413 2019-12-12 440 2019-06-15 433 2019-06-15 402 2019-06-29 483 2019-06-29 I've made the following code, but when I ran it, it didn't return any values. Is there a

How to declare a variable in header file to be used in two .cpp?

由 耗尽温柔 提交于 2020-02-04 00:02:15
问题 My target module is an executable to be built from X.cpp and Y.cpp , both these two files need a common .h file: extern HANDLE hPipe; extern IMediaSample *pSave = NULL; But when I build the module, I got an error saying : Y.obj : error LNK2005: "struct IMediaSample * pSave" (?pSave@@3PAUIMediaSample@@A) already defined in X.obj How to solve this issue? 回答1: extern IMediaSample *pSave = NULL; This is not just a declaration. This will define pSave to NULL . Since both .cpp include the .h , this

What do commas mean in a variable declaration?

由 时光怂恿深爱的人放手 提交于 2020-02-03 10:27:29
问题 I've found this in includes/parser/Parser.php of MediaWiki PHP source: public function replaceInternalLinks2( &$s ) { global $wgExtraInterlanguageLinkPrefixes; static $tc = false, $e1, $e1_img; //... } What is this comma delimited list? What value $tc receives? 回答1: It's the same as: static $tc = false; static $e1; static $e1_img; So $tc received false . 来源： https://stackoverflow.com/questions/41383218/what-do-commas-mean-in-a-variable-declaration

What do commas mean in a variable declaration?

由 限于喜欢 提交于 2020-02-03 10:26:49
问题 I've found this in includes/parser/Parser.php of MediaWiki PHP source: public function replaceInternalLinks2( &$s ) { global $wgExtraInterlanguageLinkPrefixes; static $tc = false, $e1, $e1_img; //... } What is this comma delimited list? What value $tc receives? 回答1: It's the same as: static $tc = false; static $e1; static $e1_img; So $tc received false . 来源： https://stackoverflow.com/questions/41383218/what-do-commas-mean-in-a-variable-declaration

Ansible and Playbook. How to convert shell commands into yaml syntax?

由 蓝咒 提交于 2020-02-03 06:43:24
问题 I'm a newbie in Ansible and I don't understand how all people easily write shell commands in the Ansible/YAML syntax. May be I've missed a page from the documentation where it is explained well. For example: What do I need to write in my playbook.yml if I want to perform these commands in my remote machines: sudo apt-get install software-properties-common sudo apt-key adv –recv-keys –keyserver hkp://keyserver.ubuntu.com:80 0xcbcb082a1bb943db sudo add-apt-repository 'deb http://mariadb.biz.net

Create array with empty string using %w[]

由 二次信任 提交于 2020-02-03 03:59:46
问题 To create an array with empty strings ['a', '', 'b', '', 'c'] (not one space strings ' ' ), using %W I can use %W[a #{} b #{} c] , also I can concatenate arrays, but is it possible to create array with empty strings using just %w[] ? 回答1: A couple of options %W[a b c #{''} z] %W[a b c] << " " (I know this isn't using the %w{} syntax, but for good measure: 'a,b,c,,z'.split(',') 回答2: You can use %w[a \ b \ c].map(&:strip) ,but I think it's not very clean. 回答3: try using %W instead of %w and use

C++备忘录067：Initialization in C++, the incomplete and inaccurate guide

由 匆匆过客 提交于 2020-02-02 05:50:28
We get a mess, the mess get worse, so it’s time to switch to a new language. – Nicolai Josuttis Initialization of C++ is Bonkers Default initialization Syntax Examples & Traps Summary Copy initialization Syntax Summary Aggregate intialization Syntax Examples & Traps Summary Direct initialization Syntax Examples & Traps Summary Value initialization Syntax Examples & Traps Summary List initialization Syntax Traps Summary Summary Seeking for better code guide The Future Conclusion Reference Initialization of C++ is Bonkers Intializer may be one the the following () = {} Depending on the context,
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