diff --git a/.gitignore b/.gitignore
index 12404dd..43b20c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -45,3 +45,4 @@ compile_commands.json
 CTestTestfile.cmake
 _deps
 
+build/
\ No newline at end of file
diff --git a/Acordavel.hpp b/Acordavel.hpp
new file mode 100644
index 0000000..c665cf4
--- /dev/null
+++ b/Acordavel.hpp
@@ -0,0 +1,6 @@
+#pragma once
+
+class Acordavel{
+public:
+    virtual void acorda() = 0;
+};
\ No newline at end of file
diff --git a/Alarme.cpp b/Alarme.cpp
new file mode 100644
index 0000000..e60c6eb
--- /dev/null
+++ b/Alarme.cpp
@@ -0,0 +1,19 @@
+#include "Alarme.hpp"
+
+Alarme::Alarme(){
+    
+}
+
+Alarme::~Alarme(){
+    
+}
+
+void Alarme::registraAcordavel(Acordavel* acordavel){
+    acordaveis.push_back(acordavel);
+}
+
+void Alarme::toca(){
+    for(int32_t i=0; i < acordaveis.size(); i++){
+        acordaveis.at(i)->acorda();
+    }
+}
diff --git a/Alarme.hpp b/Alarme.hpp
new file mode 100644
index 0000000..d320a30
--- /dev/null
+++ b/Alarme.hpp
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <vector>
+#include <cinttypes>
+#include "Acordavel.hpp"
+
+class Alarme{
+public:
+    Alarme();
+    ~Alarme();
+    void registraAcordavel(Acordavel* acordavel);
+    void toca();
+    std::vector<Acordavel*> acordaveis;
+};
\ No newline at end of file
diff --git a/Animal.cpp b/Animal.cpp
new file mode 100644
index 0000000..d88ab67
--- /dev/null
+++ b/Animal.cpp
@@ -0,0 +1,17 @@
+#include "Animal.hpp"
+
+#include <iostream>
+
+using namespace std;
+
+Animal::Animal(){
+    
+}
+
+Animal::~Animal(){
+    
+}
+
+void Animal::acorda(){
+    cout << "Só acorda, sem fazer barulho" << endl;
+}
\ No newline at end of file
diff --git a/Animal.hpp b/Animal.hpp
new file mode 100644
index 0000000..6647c54
--- /dev/null
+++ b/Animal.hpp
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <cinttypes>
+#include <string>
+
+#include "Acordavel.hpp"
+
+class Animal : public Acordavel{
+public:
+    Animal();
+    ~Animal();
+    virtual void acorda();
+    int32_t raca;
+    std::string _nome;
+};
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..4045a94
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.5.0)
+project(HelloWorld VERSION 0.1.0 LANGUAGES C CXX)
+
+add_executable(HelloWorld main.cpp Cachorro.cpp Gato.cpp Animal.cpp Alarme.cpp)
+
diff --git a/Cachorro.cpp b/Cachorro.cpp
new file mode 100644
index 0000000..3357e23
--- /dev/null
+++ b/Cachorro.cpp
@@ -0,0 +1,21 @@
+#include "Cachorro.hpp"
+#include <iostream>
+
+using namespace std;
+
+Cachorro::Cachorro(std::string nome){
+    cout << "Nasce um doguinho chamado " << nome << endl;
+    _nome = nome;
+}
+
+Cachorro::~Cachorro(){
+    cout << "E " << _nome << " nos deixou" << endl;
+}
+
+void Cachorro::acorda(){
+    late();
+}
+
+void Cachorro::late(){
+    cout << _nome << " faz AUAU" << endl;
+}
\ No newline at end of file
diff --git a/Cachorro.hpp b/Cachorro.hpp
new file mode 100644
index 0000000..ae10f0d
--- /dev/null
+++ b/Cachorro.hpp
@@ -0,0 +1,11 @@
+#pragma once
+
+#include "Animal.hpp"
+
+class Cachorro : public Animal{
+public:
+    Cachorro(std::string nome);
+    ~Cachorro();
+    void acorda();
+    void late();
+};
\ No newline at end of file
diff --git a/Gato.cpp b/Gato.cpp
new file mode 100644
index 0000000..c6ac7bb
--- /dev/null
+++ b/Gato.cpp
@@ -0,0 +1,21 @@
+#include "Gato.hpp"
+#include <iostream>
+
+using namespace std;
+
+Gato::Gato(std::string nome){
+    cout << "Nasce um gatinho chamado " << nome << endl;
+    _nome = nome;
+}
+
+Gato::~Gato(){
+    cout << "E " << _nome << " nos deixou" << endl;
+}
+
+void Gato::acorda(){
+    mia();
+}
+
+void Gato::mia(){
+    cout << _nome << " faz MIAU" << endl;
+}
\ No newline at end of file
diff --git a/Gato.hpp b/Gato.hpp
new file mode 100644
index 0000000..0430e78
--- /dev/null
+++ b/Gato.hpp
@@ -0,0 +1,11 @@
+#pragma once
+
+#include "Animal.hpp"
+
+class Gato : public Animal{
+public:
+    Gato(std::string nome);
+    ~Gato();
+    void acorda();
+    void mia();
+};
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..1cbf13f
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,20 @@
+#include <iostream>
+
+#include "Animal.hpp"
+#include "Cachorro.hpp"
+#include "Gato.hpp"
+#include "Alarme.hpp"
+
+Animal aleatorio;
+Cachorro bob("Bob");
+Gato selva("Selva");
+
+Alarme relogio;
+
+int main(int, char**){
+    std::cout << "Hello, from HelloWorld!\n";
+    relogio.registraAcordavel(&aleatorio);
+    relogio.registraAcordavel(&bob);
+    relogio.registraAcordavel(&selva);
+    relogio.toca();
+}