From 6a9bb5933abe82b450364a738f9e4771e7fa5b71 Mon Sep 17 00:00:00 2001
From: unlockable <g@unlockableworld.com>
Date: Fri, 2 Jun 2023 22:05:05 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9C=80=E5=90=8E=E5=8A=A0=E4=BA=86=E4=B8=80?=
 =?UTF-8?q?=E7=82=B9=E7=82=B9=E3=80=82?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 OOP/Final.md |  2 +-
 OOP/test.cpp | 13 +++++++------
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/OOP/Final.md b/OOP/Final.md
index 3f75b9d..aec474e 100644
--- a/OOP/Final.md
+++ b/OOP/Final.md
@@ -113,4 +113,4 @@
     ```c++
     className operator++(int);
     ```
-26. `<<`和`>>`不能重载为成员函数。`=`，`[]`，`()`不能重载为友元函数。
\ No newline at end of file
+26. `<<`和`>>`不能重载为成员函数，必须重载为友元函数。`=`，`[]`，`()`不能重载为友元函数，必须重载为类的成员函数。
\ No newline at end of file
diff --git a/OOP/test.cpp b/OOP/test.cpp
index 7227b7f..98f46af 100644
--- a/OOP/test.cpp
+++ b/OOP/test.cpp
@@ -1,20 +1,21 @@
 #include <iostream>
-using std::cout;
 using std::cin;
+using std::cout;
 using std::endl;
 
-template <int x>
-struct Factorial {
-    static const unsigned long long value = x * Factorial<x-1>::value;
+template <int x> struct Factorial {
+    static const unsigned long long value = x * Factorial<x - 1>::value;
 };
 
-template <>
-struct Factorial<0> {
+template <> struct Factorial<0> {
     static const unsigned long long value = 1;
 };
 
 int main() {
     Factorial<20> a;
     cout << a.value << endl;
+    int x = 1;
+    double b = 3;
+    cout << x / b * 3 << endl;
     return 0;
 }
\ No newline at end of file