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  1. #include<bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.     double x1, y1, x2, y2, x3, y3;
  8.     while(scanf("%lf %lf", &x1, &y1)==2)
  9.     {
  10.         if(x1==0.0 && y1==0.0) break;
  11.         scanf("%lf %lf %lf %lf", &x2, &y2, &x3, &y3);
  12.         double dis = (x1-x2)*(y2-y3) - (x2-x3)*(y1-y2);
  13.         cout<<dis<<endl;
  14.         if(dis==0.0)
  15.         {
  16.             printf("Impossible\n");
  17.             continue;
  18.         }
  19.         double A, B, H, K, calc1, calc2, X1, Y1, X2, Y2;
  20.         A = fabs((x1*x1) + (y1*y1) - (x2*x2) - (y2*y2));
  21.         B = fabs((x2*x2) + (y2*y2) - (x3*x3) - (y3*y3));
  22.         X1 = fabs(x1-x2);
  23.         Y1 = fabs(y1-y2);
  24.         X2 = fabs(x2-x3);
  25.         Y2 = fabs(y2-y3);
  26.         H = (A*Y2) - (B*Y1);
  27.         calc1 = 2.0 * ((X1*Y2)-(X2*Y1));
  28.         H = H/(calc1);
  29.         K = (B - (2.0*H*X2))/Y2;
  30.         K = K/2.0;
  31.         cout<<H<<' '<<K<<endl;
  32.         double disone, distwo, disthree;
  33.         disone = sqrt((x1-H)*(x1-H) + (y1-K)*(y1-K));
  34.         distwo = sqrt((x2-H)*(x2-H) + (y2-K)*(y2-K));
  35.         disthree = sqrt((x3-H)*(x3-H) + (y3-K)*(y3-K));
  36.         cout<<disone<<' '<<distwo<<' '<<disthree<<endl;
  37.         if(disone==distwo && distwo==disthree)
  38.         {
  39.             cout<<H<<' '<<K<<endl;
  40.         }
  41.         else
  42.             printf("Impossible\n");
  43.  
  44.     }
  45.     return 0;
  46. }
  47.  
Success #stdin #stdout 0s 2728KB
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https://ideone.com/p7Pxxo
language:
C++ 4.3.2 (gcc-4.3.2)
created:
9 years ago
visibility:
public

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