From d261d7a39ef1763335aba6e846fad434781594de Mon Sep 17 00:00:00 2001
From: unlockable <g@unlockableworld.com>
Date: Sat, 3 Jun 2023 14:02:58 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A4=8D=E5=88=B6=E6=9E=84=E9=80=A0=E5=87=BD?=
 =?UTF-8?q?=E6=95=B0=E7=BB=99=E6=88=91=E5=8A=A0const=EF=BC=81?=
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---
 OOP/13Exam/3.4.cpp | 9 +++------
 OOP/15Exam/3.6.cpp | 7 ++++---
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/OOP/13Exam/3.4.cpp b/OOP/13Exam/3.4.cpp
index 603addd..db681ce 100644
--- a/OOP/13Exam/3.4.cpp
+++ b/OOP/13Exam/3.4.cpp
@@ -9,7 +9,7 @@ public:
         cout << "Constructor!";
         display();
     }
-    complex(complex &c) : r(c.r), i(c.i) {
+    complex(const complex &c) : r(c.r), i(c.i) {
         cout << "Copy Constructor!";
         display();
     };
@@ -23,14 +23,11 @@ private:
 };
 
 complex complex::operator+(complex c2) {
-    complex result(r + c2.r, i + c2.i);
-    return result;
+    return complex(r + c2.r, i + c2.i);
 }
 
 complex complex::operator-(complex c2) {
-    complex result(r - c2.r, i - c2.i);
-    return result;
-    // return complex(r - c2.r, i - c2.i);
+    return complex(r - c2.r, i - c2.i);
 }
 
 void complex::display() {
diff --git a/OOP/15Exam/3.6.cpp b/OOP/15Exam/3.6.cpp
index 5c82a21..c2febf9 100644
--- a/OOP/15Exam/3.6.cpp
+++ b/OOP/15Exam/3.6.cpp
@@ -12,7 +12,7 @@ public:         // 外部接口
         cout << "Constructor!";
         display();
     }
-    complex(complex &c) : r(c.r), i(c.i) {
+    complex(const complex &c) : r(c.r), i(c.i) {
         // this->num = ++count;
         // cout << "(Num: " << this->num << ")";
 
@@ -37,9 +37,10 @@ private:
 };
 
 complex complex::operator+(complex c2) {
-    complex result(r + c2.r, i + c2.i);
-    return result;
+    // complex result(r + c2.r, i + c2.i);
+    // return result;
 
+    return complex(r + c2.r, i + c2.i);
     // 原文：return complex(r + c2.r, i + c2.i)，不能编译=_=
 }