Home Web Front-end JS Tutorial Constructor prototype mode constructs js custom objects (the most common)_javascript skills

Constructor prototype mode constructs js custom objects (the most common)_javascript skills

May 16, 2016 pm 04:48 PM
Prototype pattern Constructor

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C++ is a widely used object-oriented programming language. When defining the constructor of a class in C++, if you want to place the definition of the constructor outside the class, you need to add the class name as a qualifier to the definition of the constructor. To specify which class this constructor belongs to. This is a basic rule of C++ syntax. If this rule is not followed when defining the constructor of a class, a compilation error will appear, prompting "Constructors defined outside the class must be qualified with the class name." So, if you encounter this kind of compilation error, you should

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Yes, each class can only have one constructor. If it contains multiple constructors, an exception will be thrown. The constructor is a special function that is mainly used to initialize objects, that is, assign initial values ​​to object member variables; two points should be noted when using the constructor: 1. The constructor is used to create a certain type of object, and its first letter must be capitalized ;2. The constructor only makes sense when used together with new.

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