"this keyword in cpp" Code Answer's
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this keyword in cpp
this is a keyword that refers to the current instance of the class.
There can be 3 main usage of this keyword in C++. It can be used to
pass current object as a parameter to another method.
It can be used to refer current class instance variable.
#include <iostream>
using namespace std;
class Demo {
private:
int num;
char ch;
public:
void setMyValues(int num, char ch){
this->num =num;
this->ch=ch;
}
void displayMyValues(){
cout<<num<<endl;
cout<<ch;
}
};
int main(){
Demo obj;
obj.setMyValues(100, 'A');
obj.displayMyValues();
return 0;
}
Output:-
100
A
this in c++
#include <iostream>
class Entity
{
public:
int x, y;
Entity(int x, int y)
{
Entity*const e = this;// is a ptr to the the new instance of class
//inside non const method this == Entity*const
//e->x = 5;
//e->y =6;
this->x = x;
this->y = x;
}
int GetX()const
{
const Entity* e = this;//inside const function this is = const Entity*
}
};
int main()
{
Entity e1(1,2);
}
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