/*
 * Program to pass and return pointers arguments
 */
#include <iostream>
#include <stdio.h>
using namespace std;

double *func(double *ptr);

int main()
{
  // Pointers are variables and can be passed and returned to other functions
  // as arguments/return-values
  double *dp, *dp2;
  
  dp = new double;
  *dp = 10.5;
  dp2 = func(dp);
  printf("dp2 -- Address: %u, Value: %lf\n", dp2, *dp2);
  delete dp;
  delete(dp2);

  // NEVER return a pointer to a local variable
  
  return 0;
}

double *func(double *ptr)
{
  double *lp;
  printf("dp -- Address: %u, Value: %lf\n", ptr, *ptr);

  lp = new double;
  *lp = 20.2;
  return lp;
}