How Can I Call a Base Class's Virtual Function from an Overridden Function in C ?

Calling Base Class's Virtual Function from Overridden Function in C

In object-oriented programming, it often arises where a derived class overrides a virtual function of its base class. In Java, the super.funcname() syntax can be used to call the overridden base class's method. However, in C , this is not as straightforward.

Overriding Virtual Functions in C

In C , to override a virtual function in a derived class, the override keyword is used. This helps the compiler to check whether the overridden function's signature matches the base class's function. However, unlike Java, C does not have a direct mechanism like super to access the base class's overridden method.

Calling Base Class's Function from Derived Class

To call the overridden base class's function from the derived class, you need to explicitly name the base class. This can be done from within any method of the derived class. Here's how:

class Bar : public Foo {
  // ...

  void printStuff() override {  // help the compiler to check
    Foo::printStuff(); // calls base class' function
  }
};

In the printStuff() method of the Bar class, we use Foo::printStuff() to call the base class's function. The override keyword ensures that the compiler catches any errors or mismatches in the function signature.

By explicitly naming the base class, you can ensure that the correct function is called, even in scenarios where multiple inheritance or other complexities may exist. This explicit approach provides clarity and prevents unintended behavior.

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