c ++类成员函数

Let’s understand

让我们来了解

1. What is data member?

   什么是数据成员？

   Any variable declared inside the class in known as 'data member' of the class.

   在类内部声明的任何变量，称为类的“数据成员”。

2. What is public data member?

   什么是公共数据成员？

   A variable declared inside the 'public' section of the class is known as 'public data member'.

   在类的“公共”部分内声明的变量称为“公共数据成员”。

In this example, we are going to create a class with the pubic data members, a public data member can be accessed outside of the class with object name, and public data member’s value can be set and get outside of the class with its object name.

在此示例中，我们将使用公共数据成员创建一个类，可以使用对象名称在该类之外访问公共数据成员，并且可以设置公共数据成员的值并使用其对象名在该类之外。

So, here in this example,

因此，在此示例中，

• Number is the class name.

  数字是班级名称。

• num is an integer data member, which is declared in the public section of the class - so it is a public data member.

  num是一个整数数据成员，它在该类的public部分中声明-因此它是一个公共数据成员。

• In the main, N is the object to class Number.

  基本上， N是Number类的对象。

• N.num is using to set and then get the value.

  N.num用于设置然后获取值。

Example:

例：

#include <iostream>
using namespace std;
//class declaration 
class Number{
public:
int num;
};
//Main function 
int main()
{
//creating object
Number N;
//setting value to public data member 
N.num = 100;
//printing value
cout<<"value of N.num = "<<N.num<<endl;
return 0;
}

Output

输出量

value of N.num = 100

翻译自: https://www.includehelp.com/cpp-programs/create-a-class-with-public-data-members-only-in-cpp.aspx

c ++类成员函数