C++

Catalogue [-] 1. Types of inheritance in ODB 2. The difference between abstract and polymorphic 3.polymorphic table 4. How the previous version implemented polymorphic 5. Example This section focuses on the relationship

The reason why this blog is written is not to compare the Java language and C + + language in the end which is inferior, but from the language itself on the comparison summary program coding design differences. Because of the limited level, some

There is such a class that we base on this class:1 classFoo2 {3 Public:4 5 //void (Foo::*) (int)6 voidFoointa)7 {8cout Endl;9 }Ten One //Void (*) (int) A Static voidBarinta) - { -cout Endl; the } -};We try to invoke

The four functions that are called in this article are as follows: Atoi function: Converting a string to an int type variable ATOL function: Converting a string to a long type variable Atoll function: Converts a string to a long long type variable

today, when developing a project, it is required to implement an IP address that is queried based on the data and returned to the foreground to open with a browser. This stuff is very simple, huh. There are corresponding API functions in C + +

The C + + built-in array supports the container's mechanism, but it does not support the semantics of container abstraction. To solve this problem we implement this class ourselves. in standard C + +, it is implemented with container vectors (vector)

Conversion description and printout as result%a floating-point, hexadecimal-digit, and P-notation (C99)%A floating-point numbers, hexadecimal digits, and P-notation (C99)%c one character%d signed decimal integers%e floating-point number, E-notation

Installing boost1.48.0Download boost1.48.0 on the Boost website at the following link:Http://sourceforge.net/projects/boost/files/boost/1.48.0/boost_1_48_0.tar.gz/downloadTAR-XZVF boost_1_48_0.tar.gz extract to current directoryCD boost_1_48_0 into

Factory mode, instantiating objects, replacing new operations with factory methods.The factory model is basically the same as the simple factory model, where each addition of a subclass in a simple factory must add a judgment branch to the factory

Priority level Operator Describe Example Binding nature 1 () [] -> . :: + + -- Array subscript access operator operator that accesses a member through a pointer to an object operator that accesses

This is one of the questions I have answered.This problem is a deep pit in C, first of all to say the conclusion:char * * and const char * * are two incompatible (incompatible) types, which can be understood as not being directly assigned to a

Http://www.cnblogs.com/maowang1991/p/3290321.htmlThe following content for their more than a year of C + + learning experience, pure original, reproduced please indicate the source address.More than a year of C + + learning process, I read a lot of

, boxing and unpacking is an abstract concept 2, boxing is theValue types are converted toobject type is converted to each other, and the value type is linked to the reference type for example: int val =, Object obj = val; Console.WriteLine ("Value

1 What is reflection2, the relationship between the name space and assembly parts3. What is the use of type information during operation?4. How to use reflection to get types5. How to create objects dynamically based on type6. How to get methods and

PS: Mainly a configuration file and a conversion functionConfig file app. Config before you add Reference-System.Configuration & Using.system.configuration Conversion functions: private String Converttojson (String label, string

ObjectiveThis book in the past few years fragmented read two or three times, as a classic book, should repeat read and reread, since I began to write Bo, I am also ready to think of the classic good book reread carefully read it again, and put the

1. Anonymous typeBy defining an anonymous type with the keyword VAR, the compiler emits a strong type based on the value of the expression on the right side of the operator.Some basic rules to follow when using anonymous types:◊ An anonymous type

Declaration of originalityThe source of this post is http://blog.csdn.net/zhujunxxxxx/article/details/40124773 if reproduced please indicate the source. This article author original, email [email protected], if you have any questions, please

1, update the project code with SVN, then commmit upload the latest code.2. Under debug mode (i.e. development mode), modify the version number of two places (The app. config configuration file under the 1:securitymanagerclient project; The app.

No registered class (Exception from hresult:0x80040154 (Regdb_e_classnotreg))Workaround:This problem occurs mainly because of compatibility issues with 32-bit operating systems and 64-bit operating systems.Solution: 1, right click on the solution,