01: Prevent a header file from being repeatedly included#ifndef Comdef_h#define Comdef_hHeader file Contents#endif02: Redefine Some typesPrevents different types of bytes generated due to various platforms and compilers, which facilitates
Write good C language, beautiful macro definition is very important, the use of macro definitions can prevent errors, improve portability, readability, convenience and so on. The following is a list of commonly used macro definitions in mature
C language Macro definition tips (common macro definitions)Write good C language, beautiful macro definition is important, using macro definition can prevent errors, improve portability, readability, convenience and so on. The following is a list of
I. Overview:The string type is the most basic data storage type in Redis. It is binary safe in Redis, which means this type can accept data in any format, for example, JPEG image data or Json object description information. In Redis, the maximum
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Metrics
The Random Index was first proposed by Dr. George Lane and is a very novel and practical technical analysis index. It was first used for the analysis of the futures market, it is widely used in the middle and short-term trend analysis
There are two kinds of types in C #: Value types and reference types (Reference type). Variables of value types directly contain their data, whereas a variable of a reference type stores a reference to their data, which is called an object. For
Network Source: http://blog.chinaunix.net/uid-14022540-id-2849095.html
usage of "#" and "# # " in macros
I. GENERAL usageWe use # to turn the macro parameter into a string , and use # # to fit the two macro parameters together .
Redis data type-five data types: string, list, set, zset, hash1 ). string is the simplest type. A key corresponds to a value. String is binary secure. Redis string can contain any data, such as JPG images or serialized objects (Object serialization
Some data classes are very commonly used in development, so many compilers allow the code to operate on them with simplified syntax. For example, you can use the following syntax to assign an integer:
System.Int32 a = new System.Int32();
int a = 0
Windows Data Type
Delphi Data Type
Description
Lpstr
Pansichar
String pointer
Lpcstr
Pansichar
String pointer
DWORD
Longword
Integer
Bool
Longbool
Boolean
Overview
This article describes how to use a memory ing file to modify a large file: Add a piece of data before the memory of a large file. To use a memory ing file, perform the following steps:
Create or open a file kernel object to identify the
Windows Data Type
Delphi Data Type
Description
LPSTR
PAnsiChar
String pointer
LPCSTR
PAnsiChar
String pointer
DWORD
LongWord
Integer
BOOL
LongBool
Boolean
PBOOL
^ BOOL
Original: Data type of Windows API and Delphi data type comparison table
Windows Data types
Delphi Data types
Describe
LPSTR
Pansichar
string pointers
LPCSTR
Pansichar
ConceptData types directly supported by the compiler"C # Primitive types and corresponding FCL types"
C # Primitive types
FCL type
Description
SByte
System.SByte
Signed 8-bit value
Byte
First, overview:
The string type is the most basic type of data storage in Redis, which is binary safe in Redis, which means that the type can accept data in any format, such as JPEG image data or JSON object description information. The value of
Basic concepts of JavaScript (iv) --- operators and javascript OperatorsOperator 1. unary operator
The operator that can operate only one value is called The unary operator. The unary operator includes the increment (decrement) operator and the
I. Enumeration typeExample code:public class Enumtest {public static void Main (string[] args) {Size S=size.small;Size T=size.large; //s and T refer to not the same objectSystem.out.println (s==t); //Run result is false, only int, float data type is
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