diff --git a/assets/abs-floating.png b/assets/abs-floating.png
new file mode 100644
index 0000000..65d34be
Binary files /dev/null and b/assets/abs-floating.png differ
diff --git a/document.yaml b/document.yaml
index 00a8dbd..2697b15 100644
--- a/document.yaml
+++ b/document.yaml
@@ -39,5 +39,6 @@ sections:
   - { path: 'section/lst36.tex', newpg: true }
   - { path: 'section/lst37.tex', newpg: true }
   - { path: 'section/lst38.tex', newpg: true }
-  - { path: 'section/abs.tex', newpg: false }
+  - { path: 'section/abs.tex', newpg: true }
+  - { path: 'section/abs-floating.tex', newpg: false }
 
diff --git a/main.tex b/main.tex
index 8eaaaac..fc49814 100644
--- a/main.tex
+++ b/main.tex
@@ -44,6 +44,9 @@
     \newpage
 
     \input{section/abs.tex}
+    \newpage
+
+    \input{section/abs-floating.tex}
 
     \compiledTime
 \end{document}
diff --git a/output/main-opt-final.pdf b/output/main-opt-final.pdf
index 47550ec..92adbae 100644
Binary files a/output/main-opt-final.pdf and b/output/main-opt-final.pdf differ
diff --git a/output/main.pdf b/output/main.pdf
index 5c84fb0..05da2f5 100644
Binary files a/output/main.pdf and b/output/main.pdf differ
diff --git a/programs/abs-floating/info.json b/programs/abs-floating/info.json
new file mode 100644
index 0000000..58a0031
--- /dev/null
+++ b/programs/abs-floating/info.json
@@ -0,0 +1,10 @@
+{
+  "language": "C",
+  "name": "演習課題2 浮動小数点数版",
+  "description": "倍精度浮動小数点数を読み込み、その絶対値を出力するプログラム。",
+  "output": {
+    "type": "screenshot",
+    "content": "./assets/abs-floating.png"
+  },
+  "note": ""
+}
diff --git a/programs/abs-floating/main b/programs/abs-floating/main
new file mode 100755
index 0000000..02e7a56
Binary files /dev/null and b/programs/abs-floating/main differ
diff --git a/programs/abs-floating/main.c b/programs/abs-floating/main.c
new file mode 100644
index 0000000..4fed4c4
--- /dev/null
+++ b/programs/abs-floating/main.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+int main(void) {
+    double x, y;
+
+    printf("Input floating point: ");
+    scanf("%lf", &x);
+
+    y = x;
+
+    if (y < 0.0)
+        y = -y;
+
+    printf("Absolute value of %lf is %lf.\n", x, y);
+
+    return 0;
+}
diff --git a/section/abs-floating.tex b/section/abs-floating.tex
new file mode 100644
index 0000000..cbe5e30
--- /dev/null
+++ b/section/abs-floating.tex
@@ -0,0 +1,13 @@
+\section{演習課題2 浮動小数点数版}
+
+倍精度浮動小数点数を読み込み、その絶対値を出力するプログラム。
+
+\subsection{コードリスティング}
+
+\lstinputlisting[language=C,title={演習課題2 浮動小数点数版}]{../programs/abs-floating/main.c}
+
+\subsection{実行結果}
+
+\begin{center}
+ \includegraphics[width=\textwidth]{./assets/abs-floating.png}
+\end{center}