How to solve 'error: 'this' may only be used inside a class member function' in c++?

Example:

void outsideFunction() {
    this->myValue = 5;
}

You're trying to use the `this` pointer outside of a member function of a class.

Solution:

Ensure `this` is used only within class member functions.

class MyClass {
    int myValue;
    void memberFunction() {
        this->myValue = 5;
    }
};