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//计算两点之间距离#include<iostream>#include<MATH.H>using
namespace std;
class
Point;
class
test
{public:
double
dist(Point &p1,Point &p2);
};class
Point
{private:
int
x,y;
public:
Point(int
xx=0,int
yy=0)
{
x=xx;
y=yy;
}
void
display()
{
cout<<"("<<x<<","<<y<<")";
}
friend
double test::dist(Point &p1,Point &p2);
};double
test::dist(Point &p1,Point &p2)
{ return
sqrt(double((p1.x-p2.x)*(p1.x-p2.x)+(p1.y-p2.y)*(p1.y-p2.y)));
}int
main()
{ Point p1(3,4),p2(4,5);
p1.display();
cout<<"----->";
p2.display();
test a;
cout<<"距离："<<a.dist(p1,p2)<<endl;
return
0;
} |