fork download
copy 
  1. #include <iostream>
  2. #include<bits/stdc++.h>
  3.  
  4. using namespace std;
  5.  
  6.  
  7. double x1,x2,y2,y_1,dist;
  8.  
  9. bool lies_in_range(double x,double y)
  10. {
  11.    double dist1= sqrt((y-y_1)*(y-y_1)+(x-x1)*(x-x1));
  12.    double dist2=sqrt((y-y2)*(y-y2)+(x-x2)*(x-x2));
  13.    //cout<<"hello world\n";
  14.    //cout<<dist<<" "<<dist1+dist2<<endl;
  15.    if((dist1+dist2)==dist){
  16.          cout<<"y no cor\n";
  17.         return true;
  18.         }
  19.     else{
  20.         cout<<"not equal\n";
  21.         return false;
  22.         }
  23. }
  24.  
  25.  
  26. int main()
  27. {
  28.  
  29.     double a1,b1,c1,pt_x,pt_y;
  30.     double a2,b2,c2;
  31.  
  32.     int n,cnt=0;
  33.     cin>>x1>>y_1;
  34.     cin>>x2>>y2;
  35.     double det;
  36.     a2=-(y2-y_1);b2=x2-x1;c2=y_1*(x2-x1)-x1*(y2-y_1);
  37.     dist=sqrt((y2-y_1)*(y2-y_1)+(x2-x1)*(x2-x1));
  38.     cin>>n;
  39.     for(int i=0;i<n;i++){
  40.         cin>>a1>>b1>>c1;
  41.         det = a1*b2 - a2*b1;
  42.         if(det == 0){
  43.             continue;
  44.         }else{
  45.         pt_x = (b2*c1 - b1*c2)/det;
  46.         pt_y = (a1*c2 - a2*c1)/det;
  47.      //  cout<<pt_x<<" "<<pt_y<<endl;
  48.         if(lies_in_range(pt_x,pt_y)){
  49.             cnt++;
  50.         }
  51.     }
  52.     }
  53.     cout<<cnt<<"\n";
  54.     return 0;
  55. }
  56.  
Success #stdin #stdout 0s 3476KB
comments (?)
stdin
copy 
1 1
-1 -1
2
0 1 0
1 0 0
stdout
copy 
hello world
y no cor
hello world
y no cor
2
https://ideone.com/BYzTKb
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!