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In C, the class keyword defines a class that represents the template of an object. A class includes data members (properties), member functions (methods), constructors (called when an object is created), and destructors (called when an object is destroyed). To use a class, you create an object and then access the members of the class through the object.
The meaning of class in C
In C, the class keyword is used For defining a class, a class is a template that represents an object, which is a set of data structures with the same properties and methods.
Components of a class
A class usually contains the following parts:
The syntax of the class
The syntax of the class is as follows:
<code class="cpp">class class_name { // 数据成员 // 成员函数 };</code>
Usage of the class
To use a class, you need to create an object of the class first, and then you can access the members of the class through the object:
<code class="cpp">class Person { // 数据成员 string name; int age; // 成员函数 void printInfo() { cout << "Name: " << name << ", Age: " << age << endl; } }; int main() { // 创建对象 Person person; // 访问数据成员 person.name = "John"; person.age = 30; // 调用成员函数 person.printInfo(); return 0; }</code>
Output:
<code>Name: John, Age: 30</code>
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