C++编程题 用类做两个坐标，求两点之间的距离

用类做两个坐标，求两点之间距离 C++编程题明天上课就要交了，不交就得挂科，求尽快给以正解，在下感激不进

 class Point
{
    public: int x;
        public: int y;
        public double distance(Point p)
        {
            return sqrt((x - p.x) * (x - p.x) + (y - p.y) * (y - p.y));
        }
}

int main()
{
    Point p1, p2;
        p1.x = 1; p1.y = 2;
        p2.x = 3; p2.y = 4;
        cout << p1.disance(p2);
}

http://codepad.org/zqnz4GTt

 #include <math.h>
#include <iostream.h>
using namespace std;

class Point
{
    public: int x;
    public: int y;
    public: double distance(Point p)
    {
        return sqrt((x - p.x) * (x - p.x) + (y - p.y) * (y - p.y));
    }
};

int main()
{
    Point p1, p2;
        p1.x = 1; p1.y = 2;
        p2.x = 3; p2.y = 4;
        cout << p1.distance(p2);
}