iec 62351

1. Standard Organization 5 T8 a $ o8 d) W; U # K0 B1 uBSI British Standards Institute: l']-T7 A7 Z % B/S: R2 h o/y0 M7 [-I ISO International Standardization Organization 1 P8 [: Q. z5 V/u8 Q: E5} 2 L M8 T GIEC International Electrotechnical Commission 2 Z-V9 X V. Y) @ # X; relationship between k42. standards; W3 T # X3 B2 Z/n8 K "WBS7799 is a BSI standard for information security management. It was first established in 1995. BS 7799 and is divided into two parts: M0 G7 D (P8 K4?The first part

2018 on the IEC computer high-level language (C) job 1th time JobI. Summary of learning content1. After these weeks of study, summed up the learning experience and experience. (not less than 100 words; 10 points)After a few weeks of learning, I felt the profound computer language, but also understand that to want to learn computer will have to pay more efforts and greater determination and perseverance, the first two classes have a lot of not understa

(1) The test code:Import IEC (2) The IEC module download URL:Http://www.mayukhbose.com/python/IEC/index.php (3) I ran the test code in pyscripter-portable, and I gotFollowing error message: * ** Python 2.5.4 (r254: 67916, Dec 23 2008, 15:10:54) [MSC v.1310 32Bit (Intel)] on win32 .***>>>Traceback (most recent call last ):File "File "E:/PPy/libdl/module3.py", lin

level.Second, study and work encountered problems and solve the process.1. Program cannot runSolution: Check the compilation for errors, whether to forget to write ";", whether it is not saved.2. Once the same code as the classmate, his can run normally, but I always show a compilation error.Solution: Finally found that in the compilation process to switch the input method, resulting in unrecognized, and finally re-enter the solution.3. Tapping the code is sometimes more irritable.Solution: Fla

understandSolution: After class by asking the teacher after the teacher for me to explain the number of 59%10 to get 9, through the teacher's explanation let me suddenly enlightened.Issue 3: There was a problem writing a program in classSolution: Through the teacher's careful looking for errors, finally found that the original is my int main's main hit wrong, I was very impressed with the matter.Third, PTA operations1 #include int main (){int a,b,c;scanf ("%d%d", a,b);C=a;A=b;B=c;printf ("a=%d

I. Summary of learning contentAfter two or three weeks of study, basically to C language has a certain understanding, through some computer language and the content of our expression through the computer table. Just beginning to learn, will certainly feel difficult, mainly is the conversion of language, every time write code is a little something, all is the details of the problem, not here less punctuation, is where the symbol is not right, but as long as you want to express a clear logic, and

6 languages6.1 Marking method1. The grammatical notation, semantic category (non-terminator) used in these terms are indicated in italics , while literal words and character Set members (Terminator) are indicated in bold . A colon (:) followed by a non-terminator is derived from its definition. Lists replaceable definitions in separate lines, except when you start with the word "one". An optional symbol is indicated by the subscript "opt", so{ expressionopt }Indicates an optional expression wrap

6.4.3 Universal Character NameGrammar1. Universal Character Name:universal_character-name:\u Hex-quad(four hexadecimal digits)\u hex-quad Hex-quad Hex-quad:Hexadecimal-digit Hexadecimal-digit Hexadecimal-digit Hexadecimal-digitConstraints2, a universal character name should not specify a character, its short identifier is smaller than 00a0, in addition to 0024 ($), 0040 (@), 0060 ('), It should not be within the range of D800 to DFFFF (including both). [Note: Characters that are not allowed are

This series of posts will be based on the latest Official Handbook of ISO/IEC 9899, followed by the addition of GCC and the clang compiler to the standard extensions.This series of posts will be more than just a translation of the C programming language (C programming Language) standard, as well as a number of [translator's notes] and sample code provided by the translator personally.This document is copyrighted by Zenny Chen©, and any unauthorized pu

6.5.1 Basic ExpressionsGrammar1,primary-expression:identifierconstantstring-literal( expression )generic-selectionSemantic2, an identifier is a basic expression, provided as, it as the assignment of an object (in this case, it is an lvalue) or a function (in this case, it is a function specifier) and is declared. [Note: Thus, an undeclared identifier is a violation of this syntax.] [ Translator Note : for example:int Ten ; A; // This is a basic expression］3, a constant is a basic expression.

6.5.2 suffix operatorGrammar1,postfix-expression:primary-expressionpostfix-expression [ expression ]postfix-expression ( argument-expression-listopt )postfix-expression . identifierpostfix-expression - identifierpostfix-expression ++postfix-expression --( type-name ) { initializer-list }( type-name ) { initializer-list , }argument-expression-list:assignment-expressionargument-expression-list , assignment-expression6.5.2.1 array SubscriptConstraints1, [ Translator note : (about array subscr

6.4.9 Notes1. In addition to a character constant, a string literal, or a comment, the characters/ * introduces a comment. The content of such a comment is checked only for the identification of multibyte characters and is to be found * /to terminate. [Note: Thus,/* ... * /comments are not nested. ］2. Except in a character constant, a string literal, or a comment, the character // introduces a comment that contains all subsequent multibyte characters, but does not include the next newline charac

6.4.8 preprocessing numbersGrammar1,pp-number:Digit. Digitpp-number Digit Pp-number identifier-nondigitPp-number e SignPp-number E SignPp-number P SignPp-number P SignPp-number .Describe2, a preprocessing number can begin with a number, optionally add a point (. ), and followed by valid identifier characters as well as character sequences e+,e ,e+,e,p+,P,p + or p-.3, preprocessing the digital tag lexical inclusion of all floating-point and integer constant tags.Semantic4. A preprocessing num

6.4.2 identifier6.4.2.1 UniversalGrammar1,identifier:identifier-nodigitidentifier identifier-nondigitidentifier Digitidentifier-nondigit:NondigitUniversal-character-nameOther implementation-defined charactersnondigit: One of the following characters_ A to Z A to ZDigit: 0 to 9Semantic2, an identifier is a non-numeric (including underscores _, lowercase and uppercase Latin alphabet, and other characters) and a sequence of numbers, which assigns one or more entities described in 6.2.1. There is a

6.4 Lexical elements1.token(Mark):keyword(keywords)identifier(identifier)constant(constant)String-literal (string literal)punctuator(punctuation)Preprocessing-token(preprocessing token):header-name(header file name)identifier(identifier)Pp-number(preprocessing numbers)character-constant(character constant)string-literal(string literal)punctuator(punctuation)Each non-whitespace character that does not belong to one of the aboveConstraints2. Each preprocessing token that is converted to a token sh

-tokensoptPp-tokens:Preprocessing-tokenPp-tokens Preprocessing-tokennew-line:Line break characterDescribe2. A preprocessing indicator consists of a string of preprocessing characters that meet the following constraints: The first token in the sequence is a # preprocessor, (at the beginning of the translation Phase 4) It is either the first character in the source file (optionally, After a white-space character that does not contain newline characters), or after a white-space character that conta

Introduction1. With the introduction of new devices and extended character sets, new features may be added to this international standard. The sub-clause in this language and library clause reminds the user of the usage that the creator and the programmer may have in conflict with the new features in the future, although they are now legally valid.2. Some features are progressively discarded, which means that these features may be considered for removal from this international standard in future

6.8.5 Iteration StatementsGrammar1,iteration-statement: while ( expression ) Statement Do Statement while ( expression ) ; for ( expressionopt ; expressionopt ; expressionopt ) statement for ( declaration ; expressionopt ; expressionopt ) statementConstraints2. The control expression for an iteration statement should have a scalar type.3. The declaration portion of a For statement should only be an object declaration identifier with the auto and register storage classes.Semantic4.IS

6.2.2 identifier of the connection1. An identifier declared in a different scope or an identifier that appears more than once in the same scope can be used as a reference to the same object or function through a process called a connection . [Note: There is no connection between two different identifiers.] ] There are three types of connections: external connection, internal connection, no connection.2. In the set of translation units and libraries that comprise an entire program, each declarati

6.3.2 Other operands6.3.2.1 Lvalue, array, and function specifier1, an lvalue is an expression that potentially assigns an object (with an object type, not void); [Note: The first name "Lvalue" is derived from the assignment expression E1 = E2, in this expression E1 Required to be a (modifiable) left value. It might be better to recognize as a "locator value" for an object. The value described in this international standard as "an expression" is sometimes also referred to as "Rvalue". ] If a lef