C++

Traverse Records in a data readerWhen the ExecuteReader method returns a DataReader object, the position of the current cursor precedes the first record .The Read method of the reader must be called to move the cursor to the first record, and then

NAMEStat Get file propertiesThis function is located in the header file.Function Prototypes:int stat (const char *path, struct stat *buf);Number of references:Path file paths + file nameBUF Pointer to bufferreturn value:-1 encountered an error0

Original creation Place: http://www.cnblogs.com/Alandre/sediment brick slurry Carpenter hope reprint, keep abstract, thank you!Figure 1.1 "We hit it with stones" from the Beauty of mathematicsAmong them, he uses the strange call and the action tells

An article from cplusplus.com, which is the most comprehensive, meticulous, and in-depth article I have seen about C + + type conversion. This article describes the various types of C + + conversions, including: implicit type conversion of basic

Recent review of C + + related content, decided to record their review process here. I wrote some words before, but I didn't insist on continuous writing, so after learningBasic and forget the light, the main is no practice, this time decided to

The Static keyword in C1. Static local VariablesStatic local variables belong to static storage, which has the following characteristics:(1) A static local variable defines its lifetime as the entire program life cycle within a function, but its

AMD today announced that they are working with Microsoft's C + + version of AMP1.2, an open-source C + + compiler and an open-spec C + + AMP that can run on Linux and Windows for the first time. It appears that AMD's goal is to support more

Template class Widget; Uses "class"Template class Widget; Uses "TypeName"Answer: Nothing different. Class and TypeName mean exactly the same thing when you declare a template type parameter (the parameter for the templates). Some programmers prefer

3.8 describing complex things with struct typesUsing the variables defined by the basic data types provided by the C + + itself, you can only express something simple. For example, we can define the nage variable with the int type to represent the

4. Summary of State modeThe state pattern encapsulates the different behavior of an object in different states in a State class, allowing the environment object to behave differently by setting different state objects. While the details of the state

1. A good reversible encryption algorithm XxteaBefore inadvertently saw Texturepacker used Xxtea to encrypt the picture resources. So it took some time to see the next Xxtea.There are generally two cryptographic algorithms: 1. Like MD5,SHA1, the

Static as the name implies. In this I would like to systematically tell about the role of the static keyword, of course, mainly to tell it in the development of language C and C + + role, in other aspects of the role please find additional

0 Why do I need hash_mapDid you use map? Map provides a very common feature, which is to provide key-value storage and lookup capabilities. For example, I want to record a person name and the corresponding storage, and add at any time, to quickly

1, C , non-0 value is true, true with 1, 0 value is false, False with 0 is indicated. 2. Escape character Reference: \a Beep, Bell \b Fallback: Back one pane \f Page change \ n Line break

Pointer array && array pointerschar (*PTR) [5]; Defines a pointer to an array of PTR, pointing to an array containing 5 char types char *a[5]; Defines a pointer array A, containing 5 char* type pointers#include int main (void) {char

. C-c Language source files:This file is compiled into a C file. If it contains C + + code, you must rename the file to. CPP or. CXX files, or use the/TP switch when compiling files. If the source file contains C + + code, Microsoft recommends

Action Action Func Func Action: encapsulates a method that does not have parameters and does not return a valuepublic delegate void Action ()The action:action generic implements the definition of 1 to 16 incoming parameters, but

For a while, regular expression learning was very popular. At that time, I could see several regular expression posts in one day at csdn, during that time, I learned some basic knowledge through the C # string and regular expression reference manual

Conversion from: c |, |, &, &, Or ,~ ,! Operation Bitwise operation The bitwise operation component can only be integer or numeric type data. bitwise operations regard the operation object as Bit String information consisting of binary digits to

Today's IP networks use 32-bit addresses, represented in dotted decimal notation, such as 172.16.0.0. The address format is: IP address = network address + host address or IP address = Host address + subnet address + host address.IP address typeIn