Why *ptr points to NULL?

Question

#include <stdio.h>
#include <stdlib.h>

void Point(int*);

int main()
{
int* ptr = NULL;
Point(ptr);
printf("%p",ptr);
free(ptr);
return 0;
}

void Point(int* ptr)
{
ptr = (int*)malloc(sizeof(int));
}

https://code.sololearn.com/ct0XjpLK9BBy/?ref=app

Answer 1

Because you never assigned an actual value to the address the pointer points to. Simple as that.

Remember that pointers are only directions to an address in memory, and they will never hold the actual value. That can be accessed by following the pointer to where it is really being stored

Answer 2

Robin, your answer is very clear , thanks

Answer 3

Here is my solution code
https://code.sololearn.com/cp71Ri3tn8LM/?ref=app