Constructors with default arguments

Constructors can have default arguments as functions do. For example,

#include <iostream>
 
class Point
{
    int m_x{};
    int m_y{};
 
public:
    Point(int x, int y = 1)
        : m_x{x}, m_y{y}
    {
        std::cout << "Constructor with one default arg y Point(x, y=1)\n";
    }
 
    void print() const
    {
        std::cout << "{" << m_x << ", " << m_y << "}\n";
    }
};
 
int main(int argc, char const *argv[])
{
    const Point point{2};
    point.print();
 
    return 0;
}

point should have m_x as $2$ and m_y with default value $1$.

References

1. https://www.learncpp.com/cpp-tutorial/default-constructors-and-default-arguments/