#include<iostream>
#include<iomanip>
#include<fstream>
using namespace std;

int main()
{
  //ifstream cin("aaa.txt");
  //ofstream cout("bbb.txt");

  int n; cin>>n;
  cout<<"INTERSECTING LINES OUTPUT\n";
  for(int x1,y1,x2,y2,x3,y3,x4,y4; n--&&cin>>x1>>y1>>x2>>y2>>x3>>y3>>x4>>y4; )
  {
    cout<<fixed<<setprecision(2);
    if(x1==x2&&x3==x4) cout<<(x1==x2?"LINE\n":"NONE\n");
    else
      if(x1==x2&&x3!=x4)
      {
        double k2=double(y4-y3)/double(x4-x3), b2=double(x4*y3-x3*y4)/double(x4-x3);
        cout<<"POINT "<<double(x1)<<' '<<k2*x1+b2<<endl;
      }
    else
      if(x1!=x2&&x3==x4)
      {
        double k1=double(y2-y1)/double(x2-x1), b1=double(x2*y1-x1*y2)/double(x2-x1);
        cout<<"POINT "<<double(x3)<<' '<<k1*x3+b1<<endl;;
      }
    else
    {
      double k1=double(y2-y1)/double(x2-x1), b1=double(x2*y1-x1*y2)/double(x2-x1),
           k2=double(y4-y3)/double(x4-x3), b2=double(x4*y3-x3*y4)/double(x4-x3);
      if(k1==k2) cout<<(b1==b2?"LINE\n":"NONE\n");
      else
      {
        double x=(b1-b2)/(k2-k1), y=(k2*b1-b2*k1)/(k2-k1);
        cout<<"POINT "<<x<<' '<<y<<endl;
      }
    }
  }
  cout<<"END OF OUTPUT\n";
}

• Re:怎么一直wa。。。错哪了？？ (138) Emember 2008-12-29 12:35:15