Shulou(Shulou.com)06/02 Report--

Today, I will talk to you about how to use = default to generate the default constructor in C++, which may not be well understood by many people. In order to make you understand better, the editor has summarized the following for you. I hope you can get something from this article.

Starting with the basic knowledge of C++

Struct Point {

Int x

Int y

}

The content of the code is simple, defining a class Point that contains the member xpene y. You can use this class where needed:

Point pt

Pt.x = 10

Pt.y = 10

Although we do not define the constructor of the Point class, we can still define the pt object of the Point class and use it because the compiler automatically generates a default constructor. The effect is roughly equivalent to:

Struct Point {

Point () {}

Int x

Int y

}

Everything looks so good, but once other constructors with parameters are added for other reasons, the compiler no longer generates the default constructor.

The solution of Clear11

Clocked 11 allows us to use = default to require the compiler to generate a default constructor:

Struct Point {

Point () = default

Point (int _ x, int _ y): X (_ x), y (_ y) {}

Int x = 0

Int y = 0

}; after reading the above, do you have any further understanding of how to use = default to generate the default constructor in C++? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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