9 files changed, 142 insertions, 5 deletions
diff --git a/.gitignore b/.gitignore
index 87e54c2..4ce588c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 main
 *.o
+.vscode
diff --git a/Net.cpp b/Net.cpp
new file mode 100644
index 0000000..9ee86e7
--- /dev/null
+++ b/Net.cpp
@@ -0,0 +1,12 @@
+#include "Net.h"
+
+Net::Net(){}
+
+Net::~Net(){}
+
+void Net::setLevel(SignalLevel level){
+   this->level = level;
+}
+SignalLevel Net::getLevel(){
+   return this->level;
+}
diff --git a/Net.h b/Net.h
new file mode 100644
index 0000000..bf93377
--- /dev/null
+++ b/Net.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include "Observer.h"
+
+enum SignalLevel {LOW, HIGH, UNDEFINED};
+
+class Net: Subject {
+   private:
+      SignalLevel level = UNDEFINED;
+   public:
+      Net(/* args */);
+      ~Net();
+      virtual void setLevel(SignalLevel);
+      virtual SignalLevel getLevel();
+};
+
+
diff --git a/Node.cpp b/Node.cpp
new file mode 100644
index 0000000..7ed1f98
--- /dev/null
+++ b/Node.cpp
@@ -0,0 +1,10 @@
+#include "Node.h"
+
+Node::Node(/* args */){}
+Node::~Node(){}
+void Node::addInput(Net*){
+   
+}
+void Node::addOutput(Net*){
+
+}
diff --git a/Node.h b/Node.h
new file mode 100644
index 0000000..70a580c
--- /dev/null
+++ b/Node.h
@@ -0,0 +1,23 @@
+#pragma once
+#include <string>
+#include <vector>
+
+#include "Observer.h"
+#include "Net.h"
+
+
+
+class Node: Observer {
+   private:
+      std::string label;
+      std::string type;
+
+      std::vector<Net*> inputs;
+      std::vector<Net*> outputs;
+
+   public:
+      Node(/* args */);
+      ~Node();
+      virtual void addInput(Net*);
+      virtual void addOutput(Net*);
+};
diff --git a/Observer.cpp b/Observer.cpp
new file mode 100644
index 0000000..adc2f8d
--- /dev/null
+++ b/Observer.cpp
@@ -0,0 +1,19 @@
+#include "Observer.h"
+#include <iostream>
+
+void Observer::update(){
+   std::cout << 'a' << std::endl;
+}
+
+void Subject::attach(Observer* obs){
+   observers.push_back(obs);
+}
+void Subject::detach(Observer*){
+
+}
+		
+// TODO possibly add foo input as update value?
+void Subject::notify() {
+   for (int i = 0; i < observers.size(); i++)
+      observers.at(i)->update();
+}
diff --git a/Observer.h b/Observer.h
new file mode 100644
index 0000000..e6d4f68
--- /dev/null
+++ b/Observer.h
@@ -0,0 +1,31 @@
+#pragma once
+#include <vector>
+
+
+class Observer {
+	private:
+
+	public:
+		virtual void update();
+		
+};
+
+class Subject {
+	private:
+		std::vector<Observer*> observers;
+	public:
+		// virtual void attach(Observer* obs) { observers.push_back(obs);}
+		virtual void attach(Observer* obs);
+		virtual void detach(Observer*);
+		
+		// TODO possibly add foo input as update value?
+		virtual void notify();
+		// virtual void notify() {
+		// 	for (int i = 0; i < observers.size(); i++)
+		// 		observers.at(i)->update();
+		// }
+};
+
+
+
+
diff --git a/main.cpp b/main.cpp
index e548bf8..d7709e2 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,7 +1,14 @@
 #include <cstdio>
+// #include "Observer.h"
+#include "Net.h"
 
 int main(int argc, char** argv) {
-	printf("hello world!\n");
+	// Observer ob();
+	Net n;
+	// n.setLevel(HIGH);
+	int level = 22;
+	level = n.getLevel();
+	printf("hello world! %d\n", level);
 	return 0;
 }
 
diff --git a/makefile b/makefile
index 14da6dc..3b8b5d6 100644
--- a/makefile
+++ b/makefile
@@ -1,8 +1,25 @@
-main: main.o
+CC = g++
+LD = g++
+RM = rm -f
+CFLAGS = -g -std=c++17
+LFLAGS =
+TARGET = main \
+			Observer \
+			Node \
+			Net
+SRCS := $(wildcard *.cpp)
+OBJS := $(patsubst %.cpp,%.o, $(SRCS))
+
+all: $(TARGET)
+
+%.o: %.cpp
+	$(CC) -c $(CFLAGS) $< -o $@
+
+$(TARGET): $(OBJS)
+	$(LD) $^ $(LFLAGS) -o $@
 
 clean:
-	git clean -fxdi
+	$(RM) $(TARGET) $(OBJS)
 
-compile_commands.json:
+compile_commands: clean
 	compiledb make -Bn
-