#include <iostream>
#include <array>

using namespace std;

int silly=333,*sillyPtr=(&silly);

int mod(int a,int &b,int *c,int** &f) {
  int work=a+b+(*c)+(**f);

  a=111;         // No change, since passed by value
  b=222;         // Change, since passed by reference
  c=sillyPtr;    // No change, since passed by value
  f=(&sillyPtr); // Change, since passed by reference
  return work;
  }

//void mod(array<int,3> h,const array<int,3> &i) {
void mod(array<int,3> h,array<int,3> &i) {

  h[0]=1111;
  i[0]=11111;
  }

typedef struct {
  int a,b;
  } st;

void mod(st c) {
  c.a=4321;
  }

void mod2(st &c) {
  c.a=543;
  }

int main() {
  int a=1,b=2,c=3,d=4,*e,**f,g;

  e= &d;
  f= &e;
  cout<<"a: "<<a<<" b: "<<b<<" c: "<<c<<" d: "<<d<<" e: "<<e<<" f: "<<f<<endl;

  g=mod(a,b,&c,f);

  cout<<"g: "<<g<<endl;
  cout<<"a: "<<a<<" b: "<<b<<" c: "<<c<<" d: "<<d<<" e: "<<e<<" f: "<<f<<endl;

  array<int,3> h={11,22,33};
  array<int,3> i={111,222,333};

  mod(h,i);

  cout<<"h[0]: "<<h[0]<<" i[0]: "<<i[0]<<endl;

  st j;
  j.a=1234;
  mod(j);
  cout<<"j.a: "<<j.a<<endl;
  mod2(j);
  cout<<"j.a: "<<j.a<<endl;
  }