[OOP]构造函数

#include <stdio.h>

class Circle
{
public:
    Circle ()
    {
        printf("111111\n");
        x = y = 0;
        radius = 1;
    }
    Circle(int x, int y, int r)
    {
        printf("2222222\n");
        this->x = x;
        this->y = y;
        this->radius = r;
    }
    Circle(int x, int y)
    {
        printf("2222222\n");
        this->x = x;
        this->y = y;
        this->radius = 1;
    }

public:
    int x, y;
    int radius;

};

int main()
{
    Circle  a; 
    Circle  b(1,1, 4);  

    
    int n (10); // int n = 10;
    
    return 0;
}