这只是一种惯例。可以创建结构来保存简单的数据，但稍后会随着成员函数和构造函数的添加而发展。另一方面，在struct中看到public: access之外的东西是不寻常的。

struct和class之间的主要区别是，在struct中只能声明不同数据类型的数据变量，而在class中可以声明数据变量和成员函数，因此可以通过函数操作数据变量。

-> another handy thing that i find in class vs struct is that while implementing files in a program if you want to make some operations of a struct again and again on every new set of operations you need to make a separate function and you need to pass object of struct after reading it from the file so as to make some operations on it . while in class if you make a function that does some operations on the data needed everytime..its easy you just have to read object from file and call the function..

但这取决于程序员认为哪种方式合适……对我来说，我更喜欢类，因为它支持oop，这就是它几乎在所有语言中实现的原因，它是所有编程的美妙特性;-)

是的，我忘记提到的最令人难忘的区别是类支持数据隐藏，也支持在内置数据类型上执行的操作，而struct不支持!

. In classes all the members by default are private but in structure members are public by default. There is no term like constructor and destructor for structs, but for class compiler creates default if you don't provide. Sizeof empty structure is 0 Bytes wer as Sizeof empty class is 1 Byte The struct default access type is public. A struct should typically be used for grouping data. The class default access type is private, and the default mode for inheritance is private. A class should be used for grouping data and methods that operate on that data. In short, the convention is to use struct when the purpose is to group data, and use classes when we require data abstraction and, perhaps inheritance. In C++ structures and classes are passed by value, unless explicitly de-referenced. In other languages classes and structures may have distinct semantics - ie. objects (instances of classes) may be passed by reference and structures may be passed by value. Note: There are comments associated with this question. See the discussion page to add to the conversation.

根据c++编程语言中的Stroustrup:

你使用哪种风格取决于环境和品味。对于所有数据都是公共的类，我通常更喜欢使用struct。我认为这样的类“不是很合适的类型，只是数据结构”。

在功能上，除了public / private没有区别

类和结构之间的区别是关键字之间的区别，而不是数据类型之间的区别。这两个

struct foo : foo_base { int x;};
class bar : bar_base { int x; };

两者都定义了一个类类型。这里关键字的区别在于默认访问权限的不同:

Foo::x是公共的，foo_base是公共继承的 Bar::x是私有的，bar_base是私有继承的

类的成员默认为private。Struct的成员默认为public。除此之外，没有其他区别。还有这个问题。