The difference between class and struct in C++

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the difference

在C++中，class 和 struct 的区别在于其默认的访问权限不同。
class  默认权限是 公共 public
struct 默认权限是 私有 private

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The code is as follows (example):

#include <iostream>

using namespace std;

class MyClass
{
    
    
	int my_age; //默认权限是 私有 private
};

struct MyStruct
{
    
    
	int my_age; //默认权限是 公共 public
};

void main()
{
    
    
	//class  and struct
	//class  默认权限是 公共 public
	//struct 默认权限是 私有 private
	MyClass C1;
	MyStruct S1;

	//C1.my_age = 18; 错误，访问权限是私有
	S1.my_age = 22;

	cout << S1.my_age << endl;

	system("pause");
}

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Summarize

In C++,
the class default permission is public public
struct default permission is private private