confussed with the concept "pointers"

Question

#include <iostream>
using namespace std;

int main()
{
int score = 5;
int **scorePtr;
int ptr;
scorePtr = &score;
ptr = **scorePtr;

cout <<ptr << endl;

return 0;
}
here i have written the code to print the value 5 bt im ending up with some erros can someone explain me what changes have to be done in the codding in order to print 5 using double pointer **

Answer 1

When you put &score into scorePtr, you're treating it as a double pointer. That is, it dereferences the pointer to score (which is 5), then it tries to dereference what's at the memory address 5. You'll have to make a pointer to &score and put that into scorePtr to make your program work properly.

Answer 2

#include<iostream>
using namespace std;
int main(){
int score = 5; //score is a variable of integer type
int *ptr; //ptr is a pointer to an integer
int **scorePtr; //scorePtr is pointer to pointer
ptr = &score; //address of score is assigned to ptr
scorePtr = &ptr; //addr of ptr is assigned to scorePtr
//scorePtr is a double pointer
cout << score << *ptr << **scorePtr ;
return 0;
}