How to Define a class method outside the class definition in C++ ?

In C++, a class method can be defined outside the class definition using the scope resolution operator (::) and the class name. Here's an example:

class MyClass {
public:
    void myMethod();
};

void MyClass::myMethod() {
    // method implementation
}

In this example, the myMethod() method is defined outside the MyClass class definition using the scope resolution operator and the class name. The method implementation is defined after the class definition.

Another way to define a class method outside the class definition is to use the inline keyword. Here's an example:

class MyClass {
public:
    void myMethod();
};

inline void MyClass::myMethod() {
    // method implementation
}

In this example, the inline keyword is used to define the myMethod() method outside the MyClass class definition. The method implementation is defined after the class definition, just like in the previous example.

Note that defining a class method outside the class definition is useful when the method implementation is too large to be included in the class definition, or when the method needs to be shared across multiple classes.