Can we print the address of object of class in C++?

Just add

#include <iostream> 

at the top of the file and the following line at the bottom of main:

std::cout << &B << std::endl; 

Easiest way: printf("%p", &B);

Inside main:

std::cout << &B << std::endl; 

Inside member function:

A () { x=2; //this is a pointer to the this-object std::cout << this << std::endl; } 

Don't forget to include <iostream> for output.

Did you try

std::cout << &B; 

To get the address of an object, use the address-of operator &.

With C++20 you can use std::to_address:

#include <memory> #include <iostream> class A{}; int main() { A B; std::cout << std::to_address(&B) << '\n' } 

Which has the advantage of being able to accept raw pointers, smart pointers, iterators, and pointer-like objects. Making it useful for cases that require generic code.

You can try

cout << &B 

#include <iostream> using namespace std; class A{ public: A(){ cout<<this<<endl; } }; int main() { A* a = new A(); cout<<a<<endl; return 0; } 

If you are trying to print the memory address you need to convert B to a pointer when printing. So

cout << &B << endl; 

The ampersand, when used before a variable, calls the pointer of the variable instead of the variable itself.

If you mean in THAT specific class you have defined. You can't. Your constructor is private and you forgot a semi-colon at the end of your class definition, therefore, your code won't compile.

Ignoring these issues to display the pointer of an object in main you can use

std::cout << &B; 

Or in a member function you can use

std::cout << this; 

(Don't forget to include iostream)

this line has to be add-cout<<"address is:"<<&B;

#include <iostream> using namespace std; class A { int x; }; int main() { A B; cout<<"address is:"<<&B; return 0; } 

I see that there are a lot of answers for your question already, but I don't know why none of them point that you have a private constructor for class A, and the way the object B is being instantiated should throw a compilation error. At least, it did in my case. There is a whole lot of concepts around using private constructors, https://stackoverflow.com/a/2385764/3278350 gives a good idea.