How do I use explicit constructors in C++?

In C++, explicit constructors are used to prevent implicit conversions from taking place. By declaring a constructor with the `explicit` keyword, you ensure that it can only be called explicitly, thus avoiding unintended type conversions that can lead to bugs. This is particularly useful when defining single-argument constructors.

Example of Explicit Constructor


    class MyClass {
    public:
        explicit MyClass(int value) {
            this->value = value;
        }

        int getValue() {
            return value;
        }

    private:
        int value;
    };

    int main() {
        MyClass obj1(10);      // OK: Explicit call
        // MyClass obj2 = 20;   // Error: Implicit conversion NOT allowed
        
        return 0;
    }