diff --git a/assets/cls02.png b/assets/cls02.png
new file mode 100644
index 0000000..8176ffa
Binary files /dev/null and b/assets/cls02.png differ
diff --git a/dev-env.tex b/dev-env.tex
new file mode 100644
index 0000000..eba4832
--- /dev/null
+++ b/dev-env.tex
@@ -0,0 +1,29 @@
+\subsection{開発環境}
+
+\subsubsection{OS}
+
+筆者の開発環境ではNixOSというNixパッケージマネージャーを用いたLinuxベースの\texttt{x86\_64}OSを使用している. 執筆時点でのOSバージョンは\texttt{25.11 (Xantusia)}で, Linuxカーネルバージョンは\texttt{6.19.12}である.
+
+\subsubsection{開発パッケージ}
+
+筆者の開発環境はNixという専用の関数型言語Nixで記述された宣言的で再現可能なUnix系OS用のパッケージマネージャーを使用して構築されている.
+
+このパッケージマネージャーを用いて以下のパッケージを導入した:
+
+\begin{itemize}
+    \item \texttt{gcc15} - GNU Compiler Collection Version 15
+    \item \texttt{gdb} - GNU Debugger
+    \item \texttt{gnumake} - GNU Make
+    \item \texttt{gf} - GDB Frontend 2
+    \item \texttt{clang-tools} - Clangに付属するツール郡のスタンドアローンパッケージ
+\end{itemize}
+
+執筆時点で使用したパッケージレポジトリ\texttt{nixpkgs/nixos-unstable}のハッシュは\texttt{sha256-vPKLpjhIVWdDrfiUM8atW6YkIggCEKdSAlJPzzhkQlw=}である.
+
+\subsubsection{環境記述ファイル - \texttt{flake.nix}}
+
+開発環境は\LaTeX{}の執筆環境と共に\texttt{flake.nix}にて宣言・定義されている.
+
+開発に用いられる一時シェルの宣言箇所を以下に記す：
+
+\lstinputlisting[consecutivenumbers=false,linerange={195-207},title={開発環境の一時シェル}]{./flake.nix}
diff --git a/flake.nix b/flake.nix
index e6c2640..1c5134f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -23,6 +23,7 @@
               vim-eskk = prev.vimUtils.buildVimPlugin {
                 name = "vim-eskk";
                 src = eskk-vim;
+                buildInputs = [ pkgs.skkDictionaries.l ];
               };
             };
           })
@@ -63,7 +64,7 @@
 
             let g:eskk#directory = "~/.config/eskk"
             let g:eskk#dictionary = { 'path': "~/.config/eskk/jisyo", 'sorted': 1, 'encoding': 'utf-8', }
-            let g:eskk#large_dictionary = { 'path': "~/.config/eskk/SKK-JISYO.L", 'sorted': 1, 'encoding': 'euc-jp', }
+            let g:eskk#large_dictionary = { 'path': "${pkgs.skkDictionaries.l}/share/skk/SKK-JISYO.L", 'sorted': 1, 'encoding': 'euc-jp', }
             let g:eskk#kakutei_when_unique_candidate = 0
             let g:eskk#enable_completion = 0
             let g:eskk#no_default_mappings = 1
@@ -191,6 +192,19 @@
           pkgs.qpdfview
         ];
       };
+      devShells.cc = pkgs.stdenv.mkDerivation {
+        inherit name;
+        shellHook = ''
+          export PS1="${name} cc \w \$ "
+        '';
+        buildInputs = with pkgs; [
+          gcc15
+          gdb
+          gf
+          gnumake
+          clang-tools
+        ];
+      };
     }
   );
 }
diff --git a/out/report-cls02.pdf b/out/report-cls02.pdf
new file mode 100644
index 0000000..2ceaac3
Binary files /dev/null and b/out/report-cls02.pdf differ
diff --git a/out/report-cls02.synctex.gz b/out/report-cls02.synctex.gz
new file mode 100644
index 0000000..e767bab
Binary files /dev/null and b/out/report-cls02.synctex.gz differ
diff --git a/report-cls02.tex b/report-cls02.tex
new file mode 100644
index 0000000..59032ed
--- /dev/null
+++ b/report-cls02.tex
@@ -0,0 +1,80 @@
+\documentclass[xelatex,a4paper,11pt,ja=standard]{bxjsarticle}
+
+\usepackage{tex/preamble}
+\usepackage{tex/detailed-title}
+\usepackage{multirow}
+
+\reportauthor{柴田健琉}
+\reporttitle{前期第2回課題}
+\reportdate{2026年}{04月}{20日}
+\turnindate{2026年}{04月}{21日}
+\schoolname{岐阜工業高等専門学校}
+\department{電子制御工学科}
+\subject{情報処理2}
+\professor{遠藤 登}
+\studentid{2024D14}
+\seatingnum{15}
+
+\begin{document}
+    \detailedtitle
+
+    \section{はじめに}
+
+    この課題のプログラムは以下の環境での実行が確認されている：
+
+    \begin{itemize}
+        \item{OS: NixOS 25.11, Linux 6.19.12}
+        \item{GCC: 15.2.0}
+        \item{コンパイラフラグ: \texttt{-g -O1 -Wall -Wpedantic}}
+    \end{itemize}
+
+    \section{下準備：並び換えるデータの用意}
+
+    課題に使用するデータはLinuxの\texttt{/dev/urandom}で以下のbashコマンドで生成した.
+
+    \begin{lstlisting}[language=bash,title={乱数配列生成コマンド(Xに任意の個数)}]
+$ sed '1i\#pragma once\' <(head -c X /dev/urandom | xxd -iC -n dataX) > dataX.h
+    \end{lstlisting}
+
+    出力されるヘッダーファイルには\texttt{unsigned char}型の乱数配列\texttt{dataX}と配列の長さ\texttt{dataX\_len}が格納されている.
+
+    \lstinputlisting[language=C,title={\texttt{data10.h}}]{src/cls02/data10.h}
+    \lstinputlisting[language=C,title={\texttt{data100.h}},linerange={1-3,11-13},consecutivenumbers={false}]{src/cls02/data100.h}
+    \lstinputlisting[language=C,title={\texttt{data1000.h}},linerange={1-3,86-88},consecutivenumbers={false}]{src/cls02/data1000.h}
+
+    \newpage
+
+    \section{課題：3つのソートアルゴリズム}
+
+    10個, 100個, 1000個の乱数データに対し, 単純交換・単純選択・単純挿入ソートを実行し, 交換回数・比較回数を記録する.
+
+    \lstinputlisting[language=C,title={3つのソートアルゴリズム}]{src/cls02/main.c}
+
+    \subsection{実行結果}
+
+    \begin{figure}[tbh]
+        \centering
+        \includegraphics[width=12cm]{assets/cls02.png}
+        \caption{実行結果}
+    \end{figure}
+
+    \begin{table}[!ht]
+        \centering
+        \begin{tabular}{c|c|c|c|c|c|c}
+            \hline
+            \multirow{2}{6em}{データ数} & \multicolumn{2}{|c|}{単純交換} & \multicolumn{2}{|c|}{単純選択} & \multicolumn{2}{c}{単純挿入} \\
+            \cline{2-7}
+                                        & 比較 & 交換 & 比較 & 交換 & 比較 & 交換 \\
+                                        \hline
+            10 & 81 & 20 & 55 & 10 & 45 & 20 \\
+            100 & 9801 & 2571 & 5050 & 100 & 4950 & 2205 \\
+            1000 & 998001 & 243054 & 500500 & 1000 & 499500 & 94085 \\
+            \hline
+        \end{tabular}
+        \caption{ソートアルゴリズムとデータ数での比較・交換回数}
+    \end{table}
+
+    \appendix
+    \section{付録}
+    \input{dev-env.tex}
+\end{document}
diff --git a/src/cls02/Makefile b/src/cls02/Makefile
new file mode 100644
index 0000000..ee0736f
--- /dev/null
+++ b/src/cls02/Makefile
@@ -0,0 +1,14 @@
+include ../common.mk
+
+PROJECT_NAME:=cls02
+
+TGTS:=$(patsubst %.c,%,$(wildcard *.c))
+
+all: $(TGTS)
+
+%: %.c
+	@mkdir -p $(BUILD_PATH)/$(PROJECT_NAME)
+	$(CC) $(CFLAGS) -I. $^ -o $(BUILD_PATH)/$(PROJECT_NAME)/$@
+
+clean:
+	$(RM) -drf $(BUILD_PATH)/$(PROJECT_NAME)
diff --git a/src/cls02/data10.h b/src/cls02/data10.h
new file mode 100644
index 0000000..76ca633
--- /dev/null
+++ b/src/cls02/data10.h
@@ -0,0 +1,5 @@
+#pragma once
+unsigned char data10[] = {
+  0x4c, 0xa7, 0x72, 0x27, 0x5f, 0x7a, 0x49, 0x2e, 0xd2, 0x98
+};
+unsigned int data10_len = 10;
diff --git a/src/cls02/data100.h b/src/cls02/data100.h
new file mode 100644
index 0000000..127e967
--- /dev/null
+++ b/src/cls02/data100.h
@@ -0,0 +1,13 @@
+#pragma once
+unsigned char data100[] = {
+  0xf2, 0xfa, 0xfe, 0x5c, 0xab, 0x2c, 0x5c, 0x26, 0x9d, 0x54, 0x12, 0x56,
+  0xcd, 0x70, 0xb1, 0x0e, 0x34, 0x97, 0x70, 0x79, 0x42, 0xc8, 0xc6, 0x08,
+  0xf7, 0x3f, 0x52, 0xf8, 0x8d, 0xb9, 0x61, 0x75, 0xd4, 0xf2, 0xdd, 0x91,
+  0x69, 0xa3, 0xee, 0xa2, 0xd2, 0xd7, 0x98, 0x2f, 0x8e, 0x76, 0x74, 0x5b,
+  0x7a, 0xb6, 0x22, 0x3e, 0xd2, 0x2b, 0xc8, 0xf4, 0xed, 0xa3, 0x5b, 0xb1,
+  0xc8, 0xd5, 0x02, 0x57, 0x10, 0x80, 0xe0, 0xd8, 0xcd, 0x93, 0xd3, 0xef,
+  0x6b, 0x1d, 0x24, 0xc7, 0x05, 0xf0, 0x17, 0xae, 0xd8, 0x76, 0x34, 0x9d,
+  0x14, 0xe2, 0x59, 0x0b, 0x8e, 0xc4, 0x2a, 0x2b, 0xba, 0xdb, 0x07, 0xa2,
+  0xbf, 0x52, 0x42, 0x8c
+};
+unsigned int data100_len = 100;
diff --git a/src/cls02/data1000.h b/src/cls02/data1000.h
new file mode 100644
index 0000000..82f050b
--- /dev/null
+++ b/src/cls02/data1000.h
@@ -0,0 +1,88 @@
+#pragma once
+unsigned char data1000[] = {
+  0x1a, 0x59, 0xcf, 0xee, 0xf0, 0x16, 0x17, 0x4e, 0x3e, 0xa0, 0x24, 0x97,
+  0x0a, 0x7a, 0xd4, 0x2f, 0x78, 0x59, 0x2e, 0x7e, 0xa0, 0x38, 0x76, 0x63,
+  0x2a, 0x81, 0xb3, 0x6f, 0xe4, 0xc6, 0x33, 0xfe, 0xae, 0xd2, 0xfc, 0x28,
+  0xb5, 0x57, 0xac, 0x3b, 0x6e, 0x14, 0xe2, 0x7f, 0x1d, 0x2d, 0xe7, 0x63,
+  0x28, 0xfb, 0x4f, 0x74, 0x3d, 0x59, 0xd3, 0x65, 0x1b, 0xb8, 0x7d, 0x3a,
+  0x9b, 0x56, 0xe1, 0x40, 0x85, 0x1c, 0x42, 0x8c, 0xdf, 0x65, 0x75, 0xf7,
+  0x99, 0xe9, 0x42, 0xbd, 0x3a, 0x18, 0xf8, 0xdc, 0x47, 0x4f, 0x42, 0x33,
+  0x64, 0x40, 0x13, 0x69, 0xbf, 0xd8, 0x20, 0x25, 0x96, 0xa1, 0xe1, 0x9c,
+  0x55, 0x9b, 0x40, 0xad, 0xf0, 0x82, 0x02, 0xeb, 0x65, 0x0e, 0x86, 0xe0,
+  0x32, 0x05, 0xc0, 0x33, 0xd8, 0xac, 0x09, 0x4b, 0x99, 0xff, 0x04, 0x99,
+  0xd1, 0x5d, 0x8a, 0x3e, 0x5a, 0x26, 0xd1, 0x4a, 0x5e, 0xf3, 0xcd, 0x41,
+  0x0a, 0x06, 0x18, 0x4f, 0x1b, 0xc5, 0xe5, 0xb9, 0x0e, 0x20, 0xa3, 0x05,
+  0xfe, 0x42, 0x7d, 0xa8, 0x94, 0x55, 0xc2, 0x13, 0x63, 0xa4, 0xf0, 0x49,
+  0xf0, 0xc4, 0x92, 0xbc, 0x63, 0x72, 0xf2, 0x52, 0x2d, 0x8c, 0x3c, 0xb0,
+  0x09, 0x80, 0x38, 0x43, 0xc8, 0xb6, 0xf0, 0x65, 0xa2, 0xb4, 0x5c, 0xeb,
+  0x9f, 0x8e, 0xa6, 0xdd, 0x9e, 0x99, 0x41, 0x13, 0x72, 0xe8, 0xa0, 0x19,
+  0x62, 0x68, 0xf7, 0x2f, 0x54, 0x39, 0x04, 0x74, 0x40, 0x42, 0xec, 0x81,
+  0x91, 0xc1, 0x33, 0x9f, 0xde, 0x93, 0xdd, 0x06, 0x54, 0x57, 0x83, 0xa6,
+  0xa8, 0x2c, 0xec, 0x25, 0x2f, 0x2f, 0x08, 0xd9, 0x54, 0x4a, 0x9b, 0x44,
+  0xcd, 0xf3, 0x21, 0x38, 0x1a, 0xd9, 0xcf, 0x10, 0xba, 0xa4, 0xe2, 0xfa,
+  0x4a, 0x15, 0xc9, 0x2b, 0xcd, 0xdd, 0xfb, 0xd8, 0x8e, 0x22, 0xc3, 0xdc,
+  0x0e, 0x80, 0xeb, 0x40, 0x4c, 0xb0, 0x2a, 0xc0, 0xcb, 0x4f, 0xb5, 0xd7,
+  0xe4, 0x43, 0x22, 0x2e, 0xe0, 0xf3, 0xda, 0x47, 0x97, 0x97, 0x60, 0x66,
+  0xae, 0x7b, 0xe7, 0xe2, 0x9d, 0x19, 0x05, 0x73, 0x3d, 0x4a, 0xee, 0xc8,
+  0x06, 0xf0, 0x64, 0xbf, 0x95, 0x2f, 0x80, 0x27, 0xa1, 0x45, 0x8d, 0xfb,
+  0x22, 0x7d, 0x12, 0x9b, 0xad, 0x83, 0xd9, 0x08, 0xdc, 0x97, 0x75, 0x0f,
+  0x42, 0x88, 0xbb, 0x08, 0x14, 0x1a, 0x9f, 0xa0, 0x63, 0x1c, 0x79, 0x6f,
+  0xca, 0x11, 0x86, 0xcf, 0xf0, 0xf4, 0xf1, 0xe6, 0x0e, 0xdb, 0x64, 0x3b,
+  0x95, 0xaf, 0x74, 0x03, 0xce, 0x66, 0xa7, 0x3c, 0xcd, 0x7d, 0xb7, 0x38,
+  0x74, 0x56, 0x52, 0xa6, 0xc1, 0xfb, 0x83, 0xcb, 0x4b, 0x3f, 0xcd, 0x3a,
+  0x55, 0x7d, 0x68, 0xf0, 0xb1, 0x4c, 0xcb, 0x6c, 0x64, 0x5a, 0x13, 0x93,
+  0x6a, 0x82, 0x1a, 0x72, 0xc1, 0xec, 0x3a, 0xdf, 0x94, 0x75, 0xae, 0xfb,
+  0x88, 0x98, 0xe9, 0x21, 0x63, 0x37, 0x1e, 0x3e, 0x6c, 0x49, 0x5e, 0xe2,
+  0x59, 0x79, 0x47, 0xf0, 0x63, 0xe3, 0xa3, 0xb8, 0x53, 0xde, 0xae, 0x41,
+  0xd0, 0xd4, 0xe1, 0x44, 0x8d, 0x52, 0x36, 0xde, 0xdc, 0x17, 0x1e, 0x32,
+  0x99, 0xcb, 0xb3, 0x31, 0xaf, 0xc4, 0xb9, 0x5d, 0xf4, 0xb4, 0xa4, 0xb3,
+  0xc9, 0x6a, 0x07, 0x7a, 0xb1, 0x16, 0xf4, 0x87, 0x0a, 0x2b, 0x0a, 0x9e,
+  0x40, 0x60, 0xfe, 0x6d, 0x7c, 0x89, 0x4e, 0x82, 0x44, 0x72, 0x0e, 0xd1,
+  0xed, 0x35, 0x8b, 0xc1, 0x1b, 0x8c, 0x30, 0xd2, 0x05, 0xa2, 0x17, 0x14,
+  0xa6, 0x82, 0x2c, 0xae, 0x96, 0x6e, 0xe5, 0xec, 0xa4, 0xc2, 0x95, 0xe6,
+  0xbc, 0x2e, 0x51, 0xb5, 0x84, 0x3b, 0x58, 0x8a, 0xc1, 0x63, 0x53, 0xa5,
+  0xb9, 0x39, 0x5c, 0xe6, 0x5c, 0x7e, 0x3f, 0x7a, 0x2d, 0x01, 0x0d, 0x21,
+  0x04, 0x38, 0xd5, 0x7e, 0x12, 0xf2, 0x31, 0xa2, 0x2f, 0xfc, 0x61, 0xcd,
+  0xfe, 0x47, 0xee, 0x73, 0xfb, 0x45, 0x85, 0x9f, 0xd5, 0x83, 0xac, 0xc5,
+  0x31, 0x4f, 0xaa, 0x8d, 0x35, 0xce, 0x18, 0x85, 0x54, 0xbe, 0x91, 0x86,
+  0xa4, 0x09, 0xe2, 0xbe, 0x3c, 0x09, 0x2c, 0xef, 0xde, 0x1a, 0x31, 0x1c,
+  0xa5, 0x7d, 0xa4, 0xfd, 0x93, 0x1c, 0x9e, 0xf9, 0x46, 0xfb, 0x46, 0x7d,
+  0x21, 0x63, 0xf3, 0x54, 0xbc, 0x04, 0xf9, 0x82, 0x2b, 0x8e, 0x2b, 0x50,
+  0x91, 0x39, 0xf1, 0xe4, 0xd9, 0xe9, 0xc8, 0xd2, 0x0c, 0xf6, 0x8a, 0x24,
+  0x50, 0xf1, 0xda, 0x24, 0x6a, 0xe2, 0x62, 0x28, 0xcb, 0x5d, 0x98, 0xc7,
+  0xc5, 0x32, 0x3c, 0x3d, 0x0f, 0x46, 0x8b, 0x3b, 0x74, 0x9d, 0x76, 0x67,
+  0x98, 0x63, 0x6f, 0x02, 0x1a, 0xa3, 0x20, 0xef, 0xf9, 0xdb, 0xef, 0xb9,
+  0x6e, 0x77, 0x76, 0x94, 0x1c, 0xd3, 0x72, 0xb7, 0xe0, 0xd1, 0x01, 0x9c,
+  0xc8, 0xe1, 0xd7, 0x60, 0x8e, 0xa7, 0x27, 0x05, 0x7b, 0xf6, 0x42, 0x4c,
+  0x75, 0x66, 0x18, 0x0e, 0xfa, 0xda, 0x4e, 0x8c, 0x9b, 0xfd, 0x12, 0x55,
+  0xe9, 0x55, 0x36, 0x9b, 0x2b, 0xc4, 0xd5, 0xa2, 0x34, 0x7a, 0xc5, 0x8e,
+  0x6b, 0x69, 0x7c, 0xa2, 0x6d, 0xb5, 0x89, 0x52, 0xde, 0x10, 0x74, 0x8f,
+  0x6a, 0x07, 0x59, 0x53, 0x02, 0x94, 0x4a, 0xd2, 0x65, 0x53, 0x1e, 0x7b,
+  0xc8, 0xf8, 0x11, 0xc5, 0x78, 0x69, 0x28, 0xe5, 0x2c, 0x3e, 0x3d, 0xbd,
+  0xf5, 0x25, 0x0e, 0xe1, 0x41, 0xe4, 0x14, 0xfe, 0x92, 0x81, 0x0a, 0xc1,
+  0x12, 0xad, 0xa3, 0x21, 0x9b, 0x67, 0x7a, 0x80, 0xc5, 0xee, 0xfd, 0x33,
+  0x34, 0x30, 0x18, 0x10, 0x9b, 0x63, 0xcd, 0x67, 0xfd, 0x59, 0xf6, 0x1c,
+  0x76, 0xb5, 0x3a, 0xf6, 0x9f, 0x84, 0x81, 0xe7, 0x5b, 0x52, 0xe1, 0xaa,
+  0x4a, 0xfa, 0x71, 0xa4, 0xb7, 0x5f, 0x01, 0x7d, 0xd3, 0x7e, 0x1b, 0x87,
+  0x49, 0x57, 0x4e, 0xa0, 0xb8, 0x47, 0xff, 0xe8, 0xe5, 0x7d, 0xbb, 0x24,
+  0xfe, 0xc1, 0xf3, 0x48, 0xa0, 0x43, 0xfa, 0x83, 0x1b, 0x4c, 0xf5, 0xdb,
+  0xe8, 0x49, 0xf1, 0x9e, 0x67, 0xa7, 0xae, 0x6a, 0x31, 0xa3, 0xa0, 0x98,
+  0x9b, 0x2b, 0x9c, 0x39, 0x7a, 0x7a, 0x9f, 0x1b, 0x6e, 0x8d, 0xab, 0xd9,
+  0x72, 0xa6, 0x24, 0xd5, 0x2d, 0x00, 0x0b, 0x43, 0x23, 0x6a, 0xe3, 0xf6,
+  0x16, 0x71, 0x80, 0xb8, 0x15, 0x88, 0x21, 0xc3, 0x92, 0x05, 0xb9, 0x14,
+  0x3c, 0xd1, 0xbc, 0x23, 0x5c, 0xb2, 0xf9, 0x6f, 0x6a, 0x0a, 0x93, 0x48,
+  0x85, 0xc6, 0x4b, 0x59, 0x31, 0x16, 0x94, 0x72, 0x29, 0x48, 0x5f, 0xd3,
+  0xcb, 0x98, 0x0f, 0x1f, 0x6d, 0x82, 0xb5, 0x71, 0x72, 0x90, 0xdd, 0x57,
+  0x82, 0x4e, 0x41, 0x40, 0x6c, 0xfa, 0xe7, 0x44, 0x4a, 0x09, 0x74, 0x67,
+  0xa8, 0xeb, 0xcf, 0x35, 0x75, 0xd0, 0xca, 0x68, 0x15, 0x05, 0x93, 0x87,
+  0xc0, 0xfe, 0x03, 0xb9, 0xe7, 0x5b, 0x72, 0x7e, 0x1b, 0x7d, 0x50, 0x55,
+  0x06, 0x28, 0x5a, 0xd0, 0xca, 0xc5, 0xcf, 0x62, 0x52, 0xf5, 0x2e, 0x38,
+  0xda, 0xe6, 0xc4, 0xd9, 0x8d, 0xfb, 0xdd, 0xa4, 0x5a, 0xcb, 0xa4, 0xb2,
+  0xac, 0xdd, 0x02, 0xbd, 0xe6, 0xc8, 0xa9, 0xd4, 0x28, 0x7e, 0xf6, 0xaa,
+  0x41, 0x50, 0x2b, 0x08, 0x55, 0x1d, 0x4b, 0xa8, 0xbb, 0x97, 0x62, 0xf9,
+  0xd4, 0xc8, 0x50, 0x44, 0x44, 0xb6, 0x17, 0x99, 0x57, 0x8c, 0x23, 0x86,
+  0xfd, 0xe6, 0xf1, 0xcd, 0xd8, 0x43, 0x8c, 0x4f, 0xec, 0xe6, 0xfc, 0x30,
+  0xca, 0x43, 0xbf, 0xc8, 0xae, 0xe7, 0x1c, 0x6e, 0x19, 0x59, 0x81, 0xb2,
+  0xca, 0x30, 0x3e, 0x31
+};
+unsigned int data1000_len = 1000;
diff --git a/src/cls02/main.c b/src/cls02/main.c
new file mode 100644
index 0000000..4ac5123
--- /dev/null
+++ b/src/cls02/main.c
@@ -0,0 +1,109 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "data10.h"
+#include "data100.h"
+#include "data1000.h"
+
+// struct to store swaps and comps during sorting
+typedef struct {
+    size_t swaps;
+    size_t comparisions;
+} Status;
+
+// Common Sorting Algorithim Function Signiture/Pointer
+typedef void (*SortAlg)(unsigned char *, size_t, Status *);
+
+// print first <head> and last <tail> elements of <arr>
+void printArr(unsigned char *arr, size_t len, size_t head, size_t tail) {
+    for (size_t i = 0; i < len; i++) {
+        if (i >= len - tail || i < head) {
+            printf("%d ", arr[i]);
+        } else {
+            if (i % 50 == 0)
+                printf(". ");
+        }
+    }
+    putchar('\n');
+}
+
+// swap values
+void swap(unsigned char *a, unsigned char *b) {
+    unsigned char t = *a;
+    *a = *b;
+    *b = t;
+}
+
+void bubble_sort(unsigned char *arr, size_t len, Status *stat) {
+    for (size_t i = 0; i < len - 1; i++) {
+        for (size_t j = 0; j < len - 1; j++) {
+            if (arr[j] > arr[j + 1]) {
+                swap(&arr[j], &arr[j + 1]);
+                stat->swaps++;
+            }
+            stat->comparisions++;
+        }
+    }
+}
+
+void selection_sort(unsigned char *arr, size_t len, Status *stat) {
+    for (size_t i = 0; i < len; i++) {
+        size_t min_idx = i;
+        for (size_t j = i; j < len; j++) {
+            if (arr[j] < arr[min_idx]) {
+                min_idx = j;
+            }
+            stat->comparisions++;
+        }
+        swap(&arr[i], &arr[min_idx]);
+        stat->swaps++;
+    }
+}
+
+void insertion_sort(unsigned char *arr, size_t len, Status *stat) {
+    for (size_t i = 1; i < len; i++) {
+        for (size_t j = 0; j < i; j++) {
+            if (arr[j] > arr[i]) {
+                swap(&arr[j], &arr[i]);
+                stat->swaps++;
+            }
+            stat->comparisions++;
+        }
+    }
+}
+
+int main(void) {
+    unsigned char *datasets[3] = {data10, data100, data1000};
+    size_t datasetLengths[3] = {data10_len, data100_len, data1000_len};
+    char *labels[3] = {"bubble", "selection", "insertion"};
+    SortAlg algs[3] = {bubble_sort, selection_sort, insertion_sort};
+    unsigned char *buffer =
+        (unsigned char *)(malloc(sizeof(unsigned char) * 1000));
+    Status stats[3][3] = {{{0}}};
+
+    // For each 3 datasets, perform 3 different sorting algorithims on copied
+    // array
+    for (size_t n = 0; n < 3; n++) {
+        for (size_t m = 0; m < 3; m++) {
+            printf("%s #%ld\n", labels[m], n + 1);
+            memcpy(buffer, datasets[n], datasetLengths[n]);
+            printf("Before: ");
+            printArr(buffer, datasetLengths[n], 10, 10);
+            (*algs[m])(buffer, datasetLengths[n], &stats[n][m]);
+            printf("After: ");
+            printArr(buffer, datasetLengths[n], 10, 10);
+        }
+        putchar('\n');
+    }
+
+    for (size_t i = 0; i < 3; i++) {
+        for (int j = 0; j < 3; j++) {
+            printf("%s %ld: swaps: %ld, comps: %ld\n", labels[j],
+                   datasetLengths[i], stats[i][j].swaps,
+                   stats[i][j].comparisions);
+        }
+    }
+
+    return 0;
+}
diff --git a/src/common.mk b/src/common.mk
new file mode 100644
index 0000000..a057e69
--- /dev/null
+++ b/src/common.mk
@@ -0,0 +1,11 @@
+CC:=gcc
+CFLAGS:=-g -O1 -Wall -Wpedantic
+CXX:=g++
+CXXFLAGS:=-g -O1 -Wall -Wpedantic
+
+RM:=rm
+
+DEBUGGER:=gf2
+#DEBUGGER:=gdb
+
+BUILD_PATH:=$(abspath ../build)