add a TemplateVector program

this is a Vector using templates which means you can use any type with
the Vector instead of just a double.

src/CMakeLists.txt

@@ -16,3 +16,4 @@ add_executable(HeapMemory HeapMemory.cc)
 add_executable(AbstractClasses AbstractClasses.cc)
 add_executable(vector vector.cc)
 add_executable(Vector2 Vector2.cc)
+add_executable(TemplateVector TemplateVector.cc)

src/TemplateVector.cc

@@ -0,0 +1,71 @@
+#include <cstdlib>
+#include <format>
+#include <iostream>
+#include <stdexcept>
+template <typename T>
+class Vector {
+private:
+	T* elem;
+	int sz;
+
+public:
+	explicit Vector(int size)
+	{
+		elem = new T[size];
+		sz = size;
+	}
+	~Vector()
+	{
+		delete[] elem;
+	}
+
+	T& operator[](int i)
+	{
+		if (i < 0 || size() <= i) {
+			#if __cpp_exceptions == 199711
+			throw std::out_of_range { "Vector::operator[]" };
+			#else
+			std::exit(1);
+			#endif
+		}
+
+		return elem[i];
+	}
+
+	T* begin()
+	{
+		return &elem[0];
+	}
+
+	T* end()
+	{
+		return &elem[0] + size();
+	}
+
+	constexpr int size() const
+	{
+		return sz;
+	}
+};
+
+int main()
+{
+	Vector<double> doubles(5);
+	Vector<std::string> strings(5);
+
+	for (int i = 0; i < doubles.size(); i++) {
+		doubles[i] = i + 1;
+	}
+
+	for (int i = 0; i < strings.size(); i++) {
+		strings[i] = std::format("this is element {}", i);
+	}
+
+	for (double i : doubles) {
+		std::cout << i << std::endl;
+	}
+
+	for (std::string i : strings) {
+		std::cout << i << std::endl;
+	}
+}