From 8ac4d298a209a2b381f203c2b63e59ace9736846 Mon Sep 17 00:00:00 2001
From: y-jan137 <yousefjan24000@gmail.com>
Date: Thu, 12 Mar 2026 15:01:35 +0300
Subject: Add matrix, vector classes and tests

---
 include/matrix.hpp | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 include/matrix.hpp

(limited to 'include/matrix.hpp')

diff --git a/include/matrix.hpp b/include/matrix.hpp
new file mode 100644
index 0000000..ba3e4ae
--- /dev/null
+++ b/include/matrix.hpp
@@ -0,0 +1,41 @@
+#pragma once
+
+#include <cstddef>
+#include <initializer_list>
+#include <vector>
+
+namespace linalg {
+
+class Matrix {
+public:
+    Matrix() = default;
+    Matrix(std::size_t rows, std::size_t cols);
+    Matrix(std::size_t rows, std::size_t cols, double value);
+    Matrix(std::initializer_list<std::initializer_list<double>> values);
+
+    [[nodiscard]] std::size_t rows() const noexcept;
+    [[nodiscard]] std::size_t cols() const noexcept;
+    [[nodiscard]] bool empty() const noexcept;
+
+    double& operator()(std::size_t i, std::size_t j);
+    const double& operator()(std::size_t i, std::size_t j) const;
+
+    void fill(double value);
+
+    double* data() noexcept;
+    const double* data() const noexcept;
+
+    static Matrix identity(std::size_t n);
+    static Matrix zeros(std::size_t rows, std::size_t cols);
+
+private:
+    [[nodiscard]] std::size_t index(std::size_t i, std::size_t j) const;
+    void check_bounds(std::size_t i, std::size_t j) const;
+
+    std::size_t rows_ = 0;
+    std::size_t cols_ = 0;
+    std::vector<double> data_;
+};
+
+}  // namespace linalg
+
-- 
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