c - freeing memory using free()

I want to understand free() in c deallocates memory or it
simply erases the data in the allocated memory by
malloc.

#include
#include

int
            main()
{
 int n;
 printf("enter the size of
            n:\n");
 scanf("%d", &n);

 int*
            A=(int*)malloc(5*sizeof(int));
 int i;
 for(i=0; i            i++)
 {
 printf("%d\n", &A[i]);

            }

 free(A);


            printf("\n\n-------------\n\n");


 for(i=0; i            i++)
 {

 printf("%d\n", &A[i]);

            }

 return
            0;
}

Still
after freeing A its giving the same address of A.
What free() actually
do?