CPP Methods
C++ methods are user-defined functions that belong to a class. They define the behavior or actions that objects of the class can perform. Methods can be defined inside the class definition or outside the class definition.
Defining Methods Inside the Class Definition
To define a method inside the class definition, you can use the following syntax:
“`
class ClassName {
// Method definition
void methodName() {
// Method body
}
};
“`
For example, the following code defines a method called `get_name()` inside the `Person` class:
“`
class Person {
string name;
public:
void get_name() {
return name;
}
};
“`
Defining Methods Outside the Class Definition
To define a method outside the class definition, you can use the following syntax:
“`
class ClassName {
// Method declaration
void methodName();
};
// Method definition
void ClassName::methodName() {
// Method body
}
“`
For example, the following code defines a method called `set_name()` outside the `Person` class:
“`
class Person {
string name;
public:
void set_name();
};
void Person::set_name(string newName) {
name = newName;
}
“`
Parameters in Methods
C++ methods can have parameters. Parameters allow you to pass values to the method for processing. They can be used to customize the behavior of the method.
For example, the following code defines a method called `calculate_area()` that takes two parameters, `length` and `width`:
“`
class Rectangle {
double length;
double width;
public:
double calculate_area(double length, double width) {
return length * width;
}
};
“`
Conclusion
C++ methods are a powerful tool for organizing and structuring code. They allow you to define functions that are specific to a particular class, and they can be used to perform a wide variety of tasks.
References
* [C++ Class Methods](https://www.w3schools.com/cpp/cpp_class_methods.asp)
* [Methods in C++](https://www.codecademy.com/resources/docs/cpp/methods)
* [C++ Class Methods & Constructors: Everything You Need to Know](https://blog.hubspot.com/website/c-class-methods-constructors)
FAQs
What is a C++ method?
A C++ method is a user-defined function that belongs to a class. Methods define the behavior or actions that objects of the class can perform.
How can methods be defined in C++?
Methods can be defined in two ways in C++:
- Inside the class definition
- Outside the class definition
What is the syntax for defining a method inside the class definition?
The syntax for defining a method inside the class definition is: