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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;} |
原文：http://www.cnblogs.com/sanzang/p/3540929.html