C++作业4.22

#include<iostream>
#include<cmath>
using namespace std;

class point
{
public:
	point(float i, float j);
	friend void dist(point &p1, point &p2);
	void show();
private:
	float x;
	float y;
};
point::point(float i, float j)
{
	x = i;
	y = j;
}
void point::show()
{
	cout << "(" << x << "," << y << ")" << endl;
}
void dist(point &p1, point &p2)
{	
	float x1, y1, x2, y2;
	x1=p1.x;
	y1=p1.y;
	x2=p2.x;
	y2=p2.y;

	int a = abs(x2 - x1);
	int b = abs(y2 - y1);
	int c = sqrt(a*a + b*b);
	cout << "两个点之间的距离是" << sqrt(a*a + b*b) << endl;
}

int main()
{
	float x1, y1, x2, y2;
	cout << "请输入第一个点的坐标: " << endl;
	cin >> x1 >> y1;
	cout << "请输入第二个点的坐标: " << endl;
	cin >> x2 >> y2;
	point p1(x1, y1);
	p1.show();
	point p2(x2, y2);
	p2.show();
	dist(p1,p2);
	return 0;
}