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Merge pull request #235 from Falling-in-W-sweetty/patch-6

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Update 计数器前后自增.cpp
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Francis 2022-10-28 15:33:55 +08:00 committed by GitHub
commit 75cef2c464
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1 changed files with 5 additions and 3 deletions
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8
practical_exercises/10_day_practice/day7/一元运算符/计数器前后自增.cpp
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@ -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> #include<iostream>
using namespace std; using namespace std;
class Counter{ class Counter{
@ -17,16 +17,18 @@ Counter Counter::operator++(){
return *this; return *this;
} }
Counter Counter::operator++(int){ Counter Counter::operator++(int){
Counter t=*this;
n++; n++;
return *this; return t;
} }
Counter operator--(Counter &c){ Counter operator--(Counter &c){
--c.n; --c.n;
return c; return c;
} }
Counter operator--(Counter &c,int){ Counter operator--(Counter &c,int){
Counter t=*this;
c.n--; c.n--;
return c; return t;
} }
void Counter::display(){ void Counter::display(){
cout<<"counter number="<<n<<endl; cout<<"counter number="<<n<<endl;