diff --git a/ex01/Makefile b/ex01/Makefile
new file mode 100644
index 0000000..cf91d41
--- /dev/null
+++ b/ex01/Makefile
@@ -0,0 +1,3 @@
+override NAME = ex01.out
+
+include ../Makefile
diff --git a/ex01/src/iter.hpp b/ex01/src/iter.hpp
new file mode 100644
index 0000000..2db5477
--- /dev/null
+++ b/ex01/src/iter.hpp
@@ -0,0 +1,13 @@
+#pragma once
+
+#include <cstddef>
+
+template <typename T> void iter(T* array, const size_t size, void (*function)(T&)) {
+	for (size_t i = 0; i < size; ++i)
+		function(array[i]);
+}
+
+template <typename T> void iter(const T* array, const size_t size, void (*function)(const T&)) {
+	for (size_t i = 0; i < size; ++i)
+		function(array[i]);
+}
diff --git a/ex01/src/main.cpp b/ex01/src/main.cpp
new file mode 100644
index 0000000..6e47e6b
--- /dev/null
+++ b/ex01/src/main.cpp
@@ -0,0 +1,23 @@
+#include <iter.hpp>
+#include <cassert>
+#include <iostream>
+
+static void print(const int& i) {
+	std::cout << i << std::endl;
+}
+
+static void multiply(int& i) {
+	i *= 2;
+}
+
+int main() {
+	int array[] = {1, 2, 3, 4, 5};
+
+	iter(array, 5, multiply);
+
+	assert(array[0] == 2 && array[1] == 4 && array[2] == 6 && array[3] == 8 && array[4] == 10);
+
+	const int const_array[] = {1, 2, 3, 4, 5};
+
+	iter(const_array, 5, print);
+}