Objhdu2001java

計算兩點間的距離

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)

Total Submission(s): 168512    Accepted Submission(s):

59478

Problem Description

輸入兩點坐标（X1,Y1）,（X2,Y2）,計算并輸出兩點間的距離。

Input

輸入資料有多組，每組占一行，由4個實數組成，分别表示x1,y1,x2,y2,資料之間用空格隔開。

Output

對于每組輸入資料，輸出一行，結果保留兩位小數。

Sample Input

0 0 0 1

0 1 1 0

Sample Output

1.00

1.41

import java.util.*;

class Mian{

public static void main(String args[])

{Scanner cin=new Scanner(System.in);

while(cin.hasNext())

{ double x1=cin.nextDouble();

double y1=cin.nextDouble();

double x2=cin.nextDouble();

double y2=cin.nextDouble();

Point p1=new Point(x1,y1);

Point p2=new Point(x2,y2);

double dis=p2.distance(p1);

System.out.printf("%.2f",dis);

System.out.println();

}

}

}

class Point{

private double x;

private double y;

public Point(double x,double y)

{ this.x=x;

this.y=y;

}

public double distance(Point p)

{double dis=Math.sqrt((this.x-p.x)*(this.x-p.x)+(this.y-p.y)*(this.y-p.y));

return dis;

}

}