No Output! Why?

Question

Why these codes have no output?!

#include <iostream>
using namespace std;

int main()
{
int score = 5;
int *add;
*add= score;
cout << &score << endl;
cout << *add<< endl<< add << endl<<*&score;
delete &score;

return 0;
}

Answer 1

@lucasfid telegram id

Answer 2

#include <iostream>
using namespace std;

int main()
{
int score = 5;
int *add;
add= new int(score);
cout << &score << endl;
cout << *add<< endl<< add << endl<<*&score;
delete add;

return 0;
}

Answer 3

you have forgotten & symbol before score in
*add= score;

which means you're trying to allocate a memory address explicitly, to be 5. and I don't think there will be any memory block with this unique address(at least, I don't know). make it into *add = &score;

Answer 4

its obvious that you made a mistake by use a int poiner without initial it.

Answer 5

Tip:Obvious that you created a int pointer without initial it.