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2000: Simple Problem IV

Result	TIME Limit	MEMORY Limit	Run Times	AC Times	JUDGE
	1s	10240K	1729	685	Standard

Give three vertexs of a triangle, calculate the perimeter of the triangle.

Input

There are several test cases in the input file. The first line of the input file is an integer T, indicates the number of test cases.Then following T lines, each line contain six floating-point numbers:

Ax Ay Bx By Cx Cy

indicates the coordinates of the three vertexs.

Output

For each test case print the perimeter in a single line. The result should be rounded to the nearest thousandth.

Sample Input

2
0.0 0.0 0.0 1.0 1.0 0.0
1.0 1.0 2.0 0.0 3.0 1.0
      

Sample Output

3.414
4.828
      

This problem is used for contest: 3 

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Problem Set with Online Judge System Version 3.12

Jilin University

Developed by skywind, SIYEE

#include<cstdio>

#include<math.h>

double out(double ax,double ay,double bx,double by,double cx,double cy)

{

    double ab=sqrt((ax-bx)*(ax-bx)+(ay-by)*(ay-by));

    double ac=sqrt((ax-cx)*(ax-cx)+(ay-cy)*(ay-cy));

    double bc=sqrt((bx-cx)*(bx-cx)+(by-cy)*(by-cy));

    return ab+bc+ac;

}

int main()

{

    int n;

    scanf("%d",&n);

    double ax,ay,bx,by,cx,cy;

    double sum;

    for(int i=0;i<n;i++)

    {

        scanf("%lf%lf%lf%lf%lf%lf",&ax,&ay,&bx,&by,&cx,&cy);

        sum=out(ax,ay,bx,by,cx,cy);

        printf("%.3lf\n",sum);

    }

    return 0;

}