fix(basic_filebuf): is_openの例の微調整と出力の追加

Raclamusi · Dec 11, 2019 · 83f853d · 83f853d
1 parent 9f2709b
commit 83f853d
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/reference/fstream/basic_filebuf/is_open.md b/reference/fstream/basic_filebuf/is_open.md
@@ -23,7 +23,7 @@ bool is_open() const;
 
 int main()
 {
-  std::fstream fs("foo");
+  std::fstream fs("foo", std::ios_base::out);
   std::filebuf* buf = fs.rdbuf();
 
   if (buf->is_open()) {
@@ -36,6 +36,12 @@ int main()
 * rdbuf()[link /reference/fstream/basic_fstream/rdbuf.md]
 * is_open()[link ff0000]
 
+### 出力
+
+```
+opened
+```
+
 ## バージョン
 ### 言語
 - C++98