新增const函数参数
This commit is contained in:
Hachi
commit
5603f241d6
4
.vscode/settings.json
vendored
Normal file
4
.vscode/settings.json
vendored
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@ -0,0 +1,4 @@
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{
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"editor.suggest.snippetsPreventQuickSuggestions": false,
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"aiXcoder.showTrayIcon": true
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}
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244
0001-const.patch
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244
0001-const.patch
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@ -0,0 +1,244 @@
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From 6ca32cbbacd425a37acba74787c6199dbdc54783 Mon Sep 17 00:00:00 2001
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From: Hachi <zzy_ahut@163.com>
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Date: Thu, 16 Jun 2022 00:52:47 +0800
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Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9Econst=E5=87=BD=E6=95=B0?=
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=?UTF-8?q?=E5=8F=82=E6=95=B0?=
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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---
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.vscode/settings.json | 4 ++
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.../const/funciton_const/condition4/Test.cpp | 29 +++++++++++++
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.../const/funciton_const/condition4/Test.h | 20 +++++++++
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.../const/funciton_const/condition4/a.out | Bin 0 -> 18288 bytes
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.../const/funciton_const/condition4/main.cpp | 41 ++++++++++++++++++
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5 files changed, 94 insertions(+)
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create mode 100644 .vscode/settings.json
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create mode 100644 basic_content/const/funciton_const/condition4/Test.cpp
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create mode 100644 basic_content/const/funciton_const/condition4/Test.h
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create mode 100755 basic_content/const/funciton_const/condition4/a.out
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create mode 100644 basic_content/const/funciton_const/condition4/main.cpp
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diff --git a/.vscode/settings.json b/.vscode/settings.json
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new file mode 100644
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||||
index 0000000..3986f4a
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--- /dev/null
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+++ b/.vscode/settings.json
|
||||
@@ -0,0 +1,4 @@
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||||
+{
|
||||
+ "editor.suggest.snippetsPreventQuickSuggestions": false,
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||||
+ "aiXcoder.showTrayIcon": true
|
||||
+}
|
||||
\ No newline at end of file
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diff --git a/basic_content/const/funciton_const/condition4/Test.cpp b/basic_content/const/funciton_const/condition4/Test.cpp
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new file mode 100644
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index 0000000..c1a0e5c
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--- /dev/null
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+++ b/basic_content/const/funciton_const/condition4/Test.cpp
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@@ -0,0 +1,29 @@
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+#include "Test.h"
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+#include <iostream>
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+using namespace std;
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+
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+Test::Test()
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+{
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+ cout<<"无参构造"<<endl;
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+}
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+
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+Test::Test(int a)
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+{
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+ cout<<"类型转换构造器 有参构造"<<endl;
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+}
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+
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+Test::Test(const Test &t)
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+{
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+ cout<<"拷贝构造"<<endl;
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+}
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+
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+Test::~Test()
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+{
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+ cout<<"析构函数"<<endl;
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+}
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+
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+void Test::fun() const
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+{
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+ a = 1; //mutable修饰的成员变量可以被修改
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+ //b = 2; //非mutable修饰的变量禁止被修改
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+}
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diff --git a/basic_content/const/funciton_const/condition4/Test.h b/basic_content/const/funciton_const/condition4/Test.h
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new file mode 100644
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index 0000000..799cea8
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--- /dev/null
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+++ b/basic_content/const/funciton_const/condition4/Test.h
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@@ -0,0 +1,20 @@
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+#ifndef TEST_H
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+#define TEST_H
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+
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+class Test
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+{
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+public:
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+ Test();
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+ //类型转换构造函数(有参构造） 用于隐式转换
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+ Test(int a);
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+ //拷贝构造函数 用于显示转换
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+ Test(const Test& t);
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+
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+ void fun() const;
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+
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+ ~Test();
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+ mutable int a;
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+ int b;
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+
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+};
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+#endif // TEST_H
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diff --git a/basic_content/const/funciton_const/condition4/a.out b/basic_content/const/funciton_const/condition4/a.out
|
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new file mode 100755
|
||||
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|
||||
GIT binary patch
|
||||
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|
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|
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|
||||
|
||||
diff --git a/basic_content/const/funciton_const/condition4/main.cpp b/basic_content/const/funciton_const/condition4/main.cpp
|
||||
new file mode 100644
|
||||
index 0000000..ae22eeb
|
||||
--- /dev/null
|
||||
+++ b/basic_content/const/funciton_const/condition4/main.cpp
|
||||
@@ -0,0 +1,41 @@
|
||||
+#include <iostream>
|
||||
+#include "Test.h"
|
||||
+using namespace std;
|
||||
+
|
||||
+
|
||||
+void fun(const Test& t){
|
||||
+ t.a = 10;
|
||||
+}
|
||||
+
|
||||
+void fun2(const Test& t){
|
||||
+ t.a = 10;
|
||||
+}
|
||||
+
|
||||
+void fun3(const Test& t){
|
||||
+ t.a = 10;
|
||||
+}
|
||||
+int main()
|
||||
+{
|
||||
+ Test t_m;
|
||||
+ t_m.a = 2;
|
||||
+
|
||||
+ cout<<"==================================="<<endl;
|
||||
+
|
||||
+ cout<<"调用fun前:"<<t_m.a<<endl;//2
|
||||
+ fun(2);//隐式转换 隐式类型转换调用类型转换构造函数 发生类型转换const引用再函数中生产临时对象
|
||||
+ cout<<"调用fun后:"<<t_m.a<<endl;//2
|
||||
+
|
||||
+ cout<<"==================================="<<endl;
|
||||
+
|
||||
+ cout<<"调用fun2前:"<<t_m.a<<endl;//2
|
||||
+ fun2(Test(t_m));//显示转换 显式转换调用拷贝构造函数 发生类型转换const引用再函数中生产临时对象
|
||||
+ cout<<"调用fun2后:"<<t_m.a<<endl;//2
|
||||
+
|
||||
+ cout<<"==================================="<<endl;
|
||||
+
|
||||
+ cout<<"调用fun3前:"<<t_m.a<<endl;//2
|
||||
+ fun3(t_m);//没有发生类型转换 不产生临时变量
|
||||
+ cout<<"调用fun3后:"<<t_m.a<<endl;//10
|
||||
+
|
||||
+ return 0;
|
||||
+}
|
||||
--
|
||||
2.25.1
|
||||
|
||||
29
basic_content/const/funciton_const/condition4/Test.cpp
Normal file
29
basic_content/const/funciton_const/condition4/Test.cpp
Normal file
@ -0,0 +1,29 @@
|
||||
#include "Test.h"
|
||||
#include <iostream>
|
||||
using namespace std;
|
||||
|
||||
Test::Test()
|
||||
{
|
||||
cout<<"无参构造"<<endl;
|
||||
}
|
||||
|
||||
Test::Test(int a)
|
||||
{
|
||||
cout<<"类型转换构造器 有参构造"<<endl;
|
||||
}
|
||||
|
||||
Test::Test(const Test &t)
|
||||
{
|
||||
cout<<"拷贝构造"<<endl;
|
||||
}
|
||||
|
||||
Test::~Test()
|
||||
{
|
||||
cout<<"析构函数"<<endl;
|
||||
}
|
||||
|
||||
void Test::fun() const
|
||||
{
|
||||
a = 1; //mutable修饰的成员变量可以被修改
|
||||
//b = 2; //非mutable修饰的变量禁止被修改
|
||||
}
|
||||
20
basic_content/const/funciton_const/condition4/Test.h
Normal file
20
basic_content/const/funciton_const/condition4/Test.h
Normal file
@ -0,0 +1,20 @@
|
||||
#ifndef TEST_H
|
||||
#define TEST_H
|
||||
|
||||
class Test
|
||||
{
|
||||
public:
|
||||
Test();
|
||||
//类型转换构造函数(有参构造） 用于隐式转换
|
||||
Test(int a);
|
||||
//拷贝构造函数 用于显示转换
|
||||
Test(const Test& t);
|
||||
|
||||
void fun() const;
|
||||
|
||||
~Test();
|
||||
mutable int a;
|
||||
int b;
|
||||
|
||||
};
|
||||
#endif // TEST_H
|
||||
BIN
basic_content/const/funciton_const/condition4/a.out
Executable file
BIN
basic_content/const/funciton_const/condition4/a.out
Executable file
Binary file not shown.
41
basic_content/const/funciton_const/condition4/main.cpp
Normal file
41
basic_content/const/funciton_const/condition4/main.cpp
Normal file
@ -0,0 +1,41 @@
|
||||
#include <iostream>
|
||||
#include "Test.h"
|
||||
using namespace std;
|
||||
|
||||
|
||||
void fun(const Test& t){
|
||||
t.a = 10;
|
||||
}
|
||||
|
||||
void fun2(const Test& t){
|
||||
t.a = 10;
|
||||
}
|
||||
|
||||
void fun3(const Test& t){
|
||||
t.a = 10;
|
||||
}
|
||||
int main()
|
||||
{
|
||||
Test t_m;
|
||||
t_m.a = 2;
|
||||
|
||||
cout<<"==================================="<<endl;
|
||||
|
||||
cout<<"调用fun前:"<<t_m.a<<endl;//2
|
||||
fun(2);//隐式转换 隐式类型转换调用类型转换构造函数 发生类型转换const引用再函数中生产临时对象
|
||||
cout<<"调用fun后:"<<t_m.a<<endl;//2
|
||||
|
||||
cout<<"==================================="<<endl;
|
||||
|
||||
cout<<"调用fun2前:"<<t_m.a<<endl;//2
|
||||
fun2(Test(t_m));//显示转换 显式转换调用拷贝构造函数 发生类型转换const引用再函数中生产临时对象
|
||||
cout<<"调用fun2后:"<<t_m.a<<endl;//2
|
||||
|
||||
cout<<"==================================="<<endl;
|
||||
|
||||
cout<<"调用fun3前:"<<t_m.a<<endl;//2
|
||||
fun3(t_m);//没有发生类型转换 不产生临时变量
|
||||
cout<<"调用fun3后:"<<t_m.a<<endl;//10
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user