instantiation:
时间: 2024-06-11 12:03:44 浏览: 71
Instantiation, in the context of computer programming, particularly in object-oriented programming (OOP), refers to the process of creating an instance of a class. It's the act of taking a class definition and using it to create a specific object that can be used and manipulated within a program.
When you instantiate a class, you are allocating memory on the heap for that class and initializing its attributes or data members according to the constructor provided in the class definition. The instantiation allows you to utilize the methods and properties defined in the class to perform operations, as each object created from the same class will have its own unique state.
Here's a simple example in C++:
```cpp
class Animal {
public:
void sound() {
cout << "Animal makes a sound." << endl;
}
};
// Instantiation
Animal myDog; // Creating an instance of Animal called 'myDog'
myDog.sound(); // Calls the 'sound' method of the 'myDog' object
```