Where to declare a default constructor in c++?

by aglae_feil , in category: General Help , 2 months ago

Where to declare a default constructor in c++?

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1 answer

by wayne.swaniawski , 2 months ago

@aglae_feil 

In C++, a default constructor can be declared in a class definition or outside the class definition.

  1. Inside the class definition: class ClassName { public: ClassName() { // constructor definition } };
  2. Outside the class definition: class ClassName { public: ClassName(); }; ClassName::ClassName() { // constructor definition }


In both cases, the default constructor is declared with the class name followed by parentheses (). If the default constructor implementation is simple, you can define it directly within the class definition. However, if the constructor implementation is more complex, it is usually better to define it outside the class definition for better code organization.