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In the book "C + + programming thought" The realization mechanism of virtual function is described in detail, a generic compiler inserts a hidden code at compile time, saves the type information and the virtual function address, and when invoked, this hidden code can find a virtual function implementation that is consistent with the actual object.
We are here to provide an implementation in C that mimics th
1. Foreword
Matlab Beginners, in the compilation of MATLAB code, the feeling of the code is messy, not easy to read, suddenly think of whether you can use object-oriented thinking to write Matlab program, found on the internet, there is a special to explain the object-oriented MATLAB book, and the author also explained the design pattern, Very good. I also try to
Class scope in case of inheritance
In the case of inheritance, the scope of the derived class is nested within the scope of the base class. If the name cannot be determined in the scope of the derived class, the definition of the name is found in the perimeter base class scope. It is the hierarchical nesting of such scopes that allows us to directly access the members of the base class as if these members were members of a derived class. If you write the following code:Bulk_item Bulk; The
call is not present. One of the biggest changes here is the processing of a subclass prototype, which is given a reference to the parent prototype, which is an object.(8) Multiple inheritanceBy copying inheritance of an object property in this way, the properties and methods of multiple parent classes (objects) are copied to the subclass to implement inheritanceThree, polymorphicPolymorphism is the realization of a polymorphic processing mechanism by executing the logic by judging the parameter
"The first edition of Java Object-oriented programming" since its publication in 2016, thanks to readers of the Love, has been reprinted more than 20 times, become the Java field of the classic Java technology treasure. At the request of the broad masses of readers, in the past few months, the first edition has been upgraded, the second edition incorporates the latest JAVA8 language features, I hope it can
Object-Oriented Programming-pure virtual functions, containers and inheritance
I.Pure virtual functions
Write = 0 next to the function parameter to specify the pure virtual function:
Class Disc_item: public Item_base {public: double net_price (size_t) const = 0; // specify the pure virtual function };
Defining a function as a pure virtual function can explain that this function provides an interface tha
Object-Oriented Programming-pure virtual functions, containers and inheritance
I.Pure virtual functions
Write = 0 next to the function parameter to specify the pure virtual function:
Class Disc_item: public Item_base {public: double net_price (size_t) const = 0; // specify the pure virtual function };
Defining a function as a pure virtual function can explain that this function provides an interface tha
Object-Oriented Programming -- define basic classes and derived classes [continued]
IV,VirtualAnd other member functions
Function calls in C ++ do not use dynamic binding by default. To trigger dynamic binding, two conditions must be met:
1) only member functions specified as virtual functions can be dynamically bound. member functions are non-virtual functions by default, and non-virtual functions are not
, each sample program summarizes the learning content from the syntax and algorithm two angles. (1) test Retirement.java,retirement2.java,Lotteryodds.java master the loop control structure; (2) test Bigintegertest.java, master the use of large numerical classes; (3) test Lotterydrawing.java, master the use of arrays; (4) test Compoundinterest.java, master the use of multidimensional arrays; (5) test Lotteryarray.java, master the use of irregular arrays. The experimental results are as follows:
default value is true.
■ [[Get]: The function called when the attribute is read. The default value is undefined.
■ [[Set]: The function called when writing an attribute. The default value is undefined.
Accessors who have promised cannot be directly defined must be defined using object. defineproperty.
var book = { _year:2004,edition:1};Object.defineProperty(book,"year",{get:function(){return this._year;},
the base class's FCN ()}; Base bobj;d1 d1obj;d2 d2obj; Base *BP1 = bobj, *bp2 = d1obj, *bp3 = AMP;D2OBJ;BP1-GT;FCN ();//call BASE::FCN at run timeBP2-GT;FCN ();//call BASE::FCN at run timeBP3-GT;FCN ();//call D2::FCN at run timeThree pointers are pointers to the base class type, so the three calls are determined by locating FCN in base.Because FCN is a virtual function, the compiler generates code that is invoked at execution time based on the actual type that the reference or pointer binds to.
, but is different from a constructor because Python is not new. After the instance is created, the method is invoked before the instantiation call returns the instance.
2, object-oriented programming Common terminology abstract/implementation: Modeling reality Encapsulation/Interface synthesis: union, aggregation inheritance/derivation generalization/special polymorphism introspection/reflection
3, Classin
, the constructor pattern is used to define instance properties (each instance itself is unique, not shared), whereas the prototype pattern is used to define methods and shared properties.6.2.5 Dynamic Prototyping ModeAll information is encapsulated in the constructor, and the prototype is initialized in the constructor function.function Person (name, age, Job) { this. Name = name; this. Age = Age ; this. Job = job; if (typeofthis. Sayname! = "Functin") {// in the case that the Sayna
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