How Do I Call a Base Class Constructor with Arguments in C ?

Calling the Base Class Constructor in C

Unlike Java's super() keyword used for invoking the base class constructor, C provides a different mechanism. Let's explore how to call the base class constructor with arguments in C .

Problem:

Consider a C class with a default constructor that takes arguments, like:

class BaseClass {
public:
    BaseClass(char *name);
    .... 
};

When inheriting from this class, one might encounter a warning about the lack of an appropriate default constructor.

Solution:

C allows the base class constructor to be called within the initializer list of the subclass's constructor. Here's an example:

class Foo : public BaseClass {
public:
    Foo() : BaseClass("asdf") {}
};

In this example, when the Foo constructor is invoked, it initializes the base class BaseClass using the constructor that takes a character pointer argument, passing the string "asdf" as the argument.

Additional Note:

Base-class constructors that require arguments must be called in the initializer list before any members of the subc lass are initialized.

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