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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. struct point{
  4. 	double x,y;
  5. 	point(){}
  6. 	point(double a,double b){
  7. 		x=a;y=b;
  8. 	}
  9. 	void read(){
  10. 		scanf("%lf%lf",&x,&y);
  11. 	}
  12. 	bool isorigin(){
  13. 		return (x<1e-8&&y<1e-8);
  14. 	}
  15. 	point operator + (point p){
  16. 		return point(x+p.x,y+p.y);
  17. 	}
  18. 	point operator - (point p){
  19. 		return point(x-p.x,y-p.y);
  20. 	}
  21. 	point operator * (double r){
  22. 		return point(r*x,r*y);
  23. 	}
  24.  
  25. }A,B,C,D,E,F;
  26. double area(point a,point b,point c){
  27. 	return (a.x*b.y+b.x*c.y+c.x*a.y-a.y*b.x-b.y*c.x-c.y*a.x);
  28. }
  29. int main(){
  30. 	while(true){
  31. 		A.read();
  32. 		B.read();
  33. 		C.read();
  34. 		D.read();
  35. 		E.read();
  36. 		F.read();
  37. 		if(A.isorigin()&&B.isorigin()&&C.isorigin()&&D.isorigin()&&E.isorigin()&&F.isorigin()){
  38. 			break;
  39. 		}
  40. 		double r=area(D,E,F)/area(A,B,C)/2;
  41. 		point H=A+(C-A)*r;
  42. 		point G=B+(H-A);
  43. 		printf("%.3lf %.3lf %.3lf %.3lf\n",G.x,G.y,H.x,H.y);
  44. 	}
  45. 	return 0;
  46. }
Success #stdin #stdout 0s 3300KB
comments (?)
stdin
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0 0 5 0 0 5 3 2 7 2 0 4 
1.3 2.6 12.1 4.5 8.1 13.7 2.2 0.1 9.8 6.6 1.9 6.7 
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
stdout
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5.000 0.800 0.000 0.800
13.756 7.204 2.956 5.304
https://ideone.com/toEvx8
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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