Flash cards
Review the key moves
1/4
Core idea
What is the main idea behind C++ Constructor Overloading?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
1Quick choice
Which statement best captures the main point of this lesson?
2Fill blank
Complete the missing token from the example code.
___: string brand;3Order
Put the learning moves in the order that makes the concept easiest to apply.
In C++, you can have more than one constructor in the same class.
Why Use Constructor Overloading?
Constructor Overloading
Constructor Overloading
In C++, you can have more than one constructor in the same class. This is called constructor overloading .
Each constructor must have a different number or type of parameters , so the compiler knows which one to use when you create an object.
Why Use Constructor Overloading?
- To give flexibility when creating objects
- To set default or custom values
- To reduce repetitive code
Example with Two Constructors
This class has two constructors: one without parameters, and one with parameters:
Runnable example
class Car {
public: string brand;
string model;
Car() {
brand = "Unknown";
model = "Unknown";
}
Car(string b, string m) {
brand = b;
model = m;
}
};
int main() {
Car car1;
Car car2("BMW", "X5");
Car car3("Ford", "Mustang");
cout << "Car1: " << car1.brand << " " << car1.model << "\n";
cout << "Car2: " << car2.brand << " " << car2.model << "\n";
cout << "Car3: " << car3.brand << " " << car3.model;
return 0;
}Constructor overloading lets you create objects with custom values.