Arduino Mission Impossible

/*
   April 27, 2018
   This sketch doesn't work.
   It is an example of an attempt to allow one class to access the public properties of another different class.
*/

#include "Arduino.h"

//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
class Thing1
{
  public:
    Thing1();
    int Value1;
    float Value2;
    long Value3;
};

Thing1::Thing1() {
  Value1 = 0;
  Value2 = 0;
  Value3 = 0;
}
//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
class Thing2
{
  public:
    Thing2();
    void Change_Thing1_Value1(int);
    void Change_Thing1_Value2(float);
    void Change_Thing1_Value3(long);
};

Thing2::Thing2() {
  // nuthin
}

void Thing2::Change_Thing1_Value1(int cValue)
{
  Thing1.Value1 = cValue; // This is what should happen here.
}

void Thing2::Change_Thing1_Value2(float cValue)
{
  Thing1.Value2 = cValue; // This is what should happen here.
}

void Thing2::Change_Thing1_Value3(long cValue)
{
  Thing1.Value3 = cValue; // This is what should happen here.
}

//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

Thing1 example1 = Thing1();
Thing2 example2 = Thing2();

void setup() {
  Serial.begin(9600);
  example1.Value1 = 3; // Set initial values here.
  example2.Value2 = 4.3;
  example2.Value3 = 8;
}

void loop() {

  // Print the initial values
  Serial.println("Point #1");
  Serial.println(example1.Value1);
  Serial.println(example1.Value2);
  Serial.println(example1.Value3);
  Serial.println(" ");

  // Change the initial values
  example2.Change_Thing1_Value1(4);
  example2.Change_Thing1_Value2(5.1);
  example2.Change_Thing1_Value3(11);

  // Print the new values
  Serial.println("Point #2");
  Serial.println(example1.Value1);
  Serial.println(example1.Value2);
  Serial.println(example1.Value3);
  Serial.println(" ");

  Serial.println("Finished");

  delay(10000);
}