what is this pointer 3f explain with an example

1Every object in C++ has access to its own address through an important pointer called this pointer.
2The this pointer is an implicit parameter to all member functions.
3Therefore, inside a member function, this may be used to refer to the invoking object.
4
5Example:
6#include <iostream>
7using namespace std;
8class Demo {
9private:
10  int num;
11  char ch;
12public:
13  void setMyValues(int num, char ch){
14    this->num =num;
15    this->ch=ch;
16  }
17  void displayMyValues(){
18    cout<<num<<endl;
19    cout<<ch;
20  }
21};
22int main(){
23  Demo obj;
24  obj.setMyValues(100, 'A');
25  obj.displayMyValues();
26  return 0;
27}
28