DevWiki/CPlusPlusThings
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

support bazel complie this project and format code.

Browse Source
This commit is contained in:
zhangxing
2023-03-30 00:15:11 +08:00
committed by light-city
parent 1f86192576
commit 7529ae3a55
636 changed files with 10025 additions and 9387 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
basic_content/sizeof/BUILD Normal file
View File

@@ -0,0 +1,51 @@
# please run `bazel run basic_content/sizeof:blackclass`
# please run `bazel run basic_content/sizeof:genA`
# please run `bazel run basic_content/sizeof:geninhe`
# please run `bazel run basic_content/sizeof:moreinhe`
# please run `bazel run basic_content/sizeof:morevir`
# please run `bazel run basic_content/sizeof:static`
# please run `bazel run basic_content/sizeof:virinhe`
# please run `bazel run basic_content/sizeof:virmoreinhe`
load("@rules_cc//cc:defs.bzl", "cc_binary")
cc_binary(
name = "blackclass",
srcs = ["blackclass.cpp"],
copts = ["-std=c++11"]
)
cc_binary(
name = "genA",
srcs = ["genA.cpp"],
copts = ["-std=c++11"]
)
cc_binary(
name = "geninhe",
srcs = ["geninhe.cpp"],
copts = ["-std=c++11"]
)
cc_binary(
name = "moreinhe",
srcs = ["moreinhe.cpp"],
copts = ["-std=c++11"]
)
cc_binary(
name = "static",
srcs = ["static.cpp"],
copts = ["-std=c++11"]
)
cc_binary(
name = "virinhe",
srcs = ["virinhe.cpp"],
copts = ["-std=c++11"]
)
cc_binary(
name = "virmoreinhe",
srcs = ["virmoreinhe.cpp"],
copts = ["-std=c++11"]
)

15
basic_content/sizeof/blackclass.cpp
View File

@@ -6,14 +6,11 @@
* @date 2019-07-21
*/
#include<iostream>
#include<bits/stdc++.h>
#include <bits/stdc++.h>
#include <iostream>
using namespace std;
#include<graphics.h> // use size in graphics also
class A{};
int main()
{
cout<<sizeof(A)<<endl;
cout<<sizeof
return 0;
class A {};
int main() {
cout << sizeof(A) << endl;
return 0;
}

30
basic_content/sizeof/genA.cpp
View File

@@ -1,29 +1,27 @@
/**
* @file genA.cpp
* @brief 普通成员函数，大小为1,一个类中，虚函数本身、成员函数（包括静态与非静态）和静态数据成员都是不占用类对象的存储空间。
* @brief
* 普通成员函数，大小为1,一个类中，虚函数本身、成员函数（包括静态与非静态）和静态数据成员都是不占用类对象的存储空间。
* @author 光城
* @version v1
* @date 2019-07-21
*/
#include<iostream>
#include <iostream>
using namespace std;
class A
{
public:
A();
~A();
static int a;
static void fun3();
void fun();
void fun1();
class A {
public:
A();
~A();
static int a;
static void fun3();
void fun();
void fun1();
};
int main()
{
cout<<sizeof(A)<<endl; // 1
return 0;
int main() {
cout << sizeof(A) << endl; // 1
return 0;
}

60
basic_content/sizeof/geninhe.cpp
View File

@@ -8,15 +8,14 @@
* @date 2019-07-21
*/
#include<iostream>
#include <iostream>
using namespace std;
class A
{
public:
char a;
int b;
class A {
public:
char a;
int b;
};
/**
@@ -34,39 +33,32 @@ class A
* long b
* 根据字节对齐2+2+4+8=16
*/
class B:A
{
public:
short a;
long b;
class B : A {
public:
short a;
long b;
};
/**
* 把A的成员拆开看，char为1，int为4，所以是1+（3）+4+1+（3）=12，（）为字节补齐
*/
class C
{
A a;
char c;
* 把A的成员拆开看，char为1，int为4，所以是1+（3）+4+1+（3）=12，（）为字节补齐
*/
class C {
A a;
char c;
};
class A1
{
virtual void fun(){}
};
class C1:public A
{
class A1 {
virtual void fun() {}
};
class C1 : public A {};
int main() {
cout << sizeof(A) << endl; // 8
cout << sizeof(B) << endl; // 16
cout << sizeof(C) << endl; // 12
int main()
{
cout<<sizeof(A)<<endl; // 8
cout<<sizeof(B)<<endl; // 16
cout<<sizeof(C)<<endl; // 12
/**
* @brief 对于虚单函数继承，派生类也继承了基类的vptr，所以是8字节
*/
cout<<sizeof(C1)<<endl; // 8
return 0;
/**
* @brief 对于虚单函数继承，派生类也继承了基类的vptr，所以是8字节
*/
cout << sizeof(C1) << endl; // 8
return 0;
}

37
basic_content/sizeof/moreinhe.cpp
View File

@@ -6,38 +6,33 @@
* @date 2019-07-21
*/
#include<iostream>
#include <iostream>
using namespace std;
class A
{
public:
char a;
int b;
class A {
public:
char a;
int b;
};
class B
{
public:
short a;
long b;
class B {
public:
short a;
long b;
};
/**
* @brief 8+16+8=32
*/
class C:A,B
{
char c;
class C : A, B {
char c;
};
int main() {
cout << sizeof(A) << endl; // 8
cout << sizeof(B) << endl; // 16
cout << sizeof(C) << endl; // 32
int main()
{
cout<<sizeof(A)<<endl; // 8
cout<<sizeof(B)<<endl; // 16
cout<<sizeof(C)<<endl; // 32
return 0;
return 0;
}

19
basic_content/sizeof/morevir.cpp
View File

@@ -6,19 +6,18 @@
* @date 2019-07-21
*/
#include<iostream>
#include <iostream>
using namespace std;
class A{
class A {
virtual void fun();
virtual void fun1();
virtual void fun2();
virtual void fun3();
virtual void fun();
virtual void fun1();
virtual void fun2();
virtual void fun3();
};
int main()
{
cout<<sizeof(A)<<endl;
return 0;
int main() {
cout << sizeof(A) << endl;
return 0;
}

35
basic_content/sizeof/static.cpp
View File

@@ -1,33 +1,30 @@
/**
* @file static.cpp
* @brief 静态数据成员
* 静态数据成员被编译器放在程序的一个global data members中，它是类的一个数据成员，但不影响类的大小。不管这个类产生了多少个实例，还是派生了多少新的类，静态数据成员只有一个实例。静态数据成员，一旦被声明，就已经存在。
* 静态数据成员被编译器放在程序的一个global data
* members中，它是类的一个数据成员，但不影响类的大小。不管这个类产生了多少个实例，还是派生了多少新的类，静态数据成员只有一个实例。静态数据成员，一旦被声明，就已经存在。
* @author 光城
* @version v1
* @date 2019-07-21
*/
#include<iostream>
#include <iostream>
using namespace std;
class A
{
public:
char b;
virtual void fun() {};
static int c;
static int d;
static int f;
class A {
public:
char b;
virtual void fun(){};
static int c;
static int d;
static int f;
};
int main() {
/**
* @brief 16 字节对齐、静态变量不影响类的大小、vptr指针=8
*/
cout << sizeof(A) << endl;
int main()
{
/**
* @brief 16 字节对齐、静态变量不影响类的大小、vptr指针=8
*/
cout<<sizeof(A)<<endl;
return 0;
return 0;
}

33
basic_content/sizeof/virinhe.cpp
View File

@@ -6,33 +6,28 @@
* @date 2019-07-21
*/
#include<iostream>
#include <iostream>
using namespace std;
class A
{
virtual void fun() {}
class A {
virtual void fun() {}
};
class B
{
virtual void fun2() {}
class B {
virtual void fun2() {}
};
class C : virtual public A, virtual public B
{
public:
virtual void fun3() {}
class C : virtual public A, virtual public B {
public:
virtual void fun3() {}
};
int main() {
int main()
{
/**
* @brief 8 8 16 派生类虚继承多个虚函数，会继承所有虚函数的vptr
*/
cout << sizeof(A) << " " << sizeof(B) << " " << sizeof(C);
/**
* @brief 8 8 16 派生类虚继承多个虚函数，会继承所有虚函数的vptr
*/
cout<<sizeof(A)<<" "<<sizeof(B)<<" "<<sizeof(C);
return 0;
return 0;
}

33
basic_content/sizeof/virmoreinhe.cpp
View File

@@ -6,33 +6,28 @@
* @date 2019-07-21
*/
#include<iostream>
#include <iostream>
using namespace std;
class A
{
virtual void fun() {}
class A {
virtual void fun() {}
};
class B
{
virtual void fun2() {}
class B {
virtual void fun2() {}
};
class C : public A, public B
{
public:
virtual void fun3() {}
class C : public A, public B {
public:
virtual void fun3() {}
};
int main() {
int main()
{
/**
* @brief 8 8 16 派生类继承多个虚函数，会继承所有虚函数的vptr
*/
cout << sizeof(A) << " " << sizeof(B) << " " << sizeof(C);
/**
* @brief 8 8 16 派生类继承多个虚函数，会继承所有虚函数的vptr
*/
cout<<sizeof(A)<<" "<<sizeof(B)<<" "<<sizeof(C);
return 0;
return 0;
}