Update 计数器前后自增.cpp

xiaoxiangwendao · Aug 14, 2022 · 374867b · 374867b
1 parent 9f58fef
commit 374867b
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/practical_exercises/10_day_practice/day7/一元运算符/计数器前后自增.cpp b/practical_exercises/10_day_practice/day7/一元运算符/计数器前后自增.cpp
@@ -1,4 +1,4 @@
-//设计一个计数器counter，用类成员重载自增运算符实现计数器的自增，用友元重载实现计数器的自减。
+//设计一个计数器counter，用类成员重载自增运算符实现计数器的自增，用友元重载实现计数器的自减。
 #include<iostream>
 using namespace std;
 class Counter{
@@ -17,16 +17,18 @@ Counter Counter::operator++(){
     return *this;
 }
 Counter Counter::operator++(int){
+    Counter t=*this;
     n++;
-    return *this;
+    return t;
 }
 Counter operator--(Counter &c){
     --c.n;
     return c;
 }
 Counter operator--(Counter &c,int){
+    Counter t=*this;
     c.n--;
-    return c;
+    return t;
 }
 void Counter::display(){
     cout<<"counter number="<<n<<endl;