190 - Circle through three points/190.cpp

   1 using namespace std;
   2 #include <algorithm>
   3 #include <iostream>
   4 #include <iterator>
   5 #include <sstream>
   6 #include <fstream>
   7 #include <cassert>
   8 #include <climits>
   9 #include <cstdlib>
  10 #include <cstring>
  11 #include <string>
  12 #include <cstdio>
  13 #include <vector>
  14 #include <cmath>
  15 #include <queue>
  16 #include <deque>
  17 #include <stack>
  18 #include <list>
  19 #include <map>
  20 #include <set>
  21
  22 template <class T> string toStr(const T &x){ stringstream s; s << x; return s.str(); }
  23 template <class T> int toInt(const T &x){ stringstream s; s << x; int r; s >> r; return r; }
  24
  25 #define For(i, a, b) for (int i=(a); i<(b); ++i)
  26 #define foreach(x, v) for (typeof (v).begin() x = (v).begin(); x != (v).end(); ++x)
  27 #define D(x) cout << #x " = " << (x) << endl
  28
  29 struct point{
  30   double x, y;
  31   point(){} point(double x, double y) : x(x), y(y) {}
  32   const point perp() const{
  33     return point(-y, x);
  34   }
  35   point operator - (const point &t) const{
  36     return point(x - t.x, y - t.y);
  37   }
  38   point operator + (const point &t) const{
  39     return point(x + t.x, y + t.y);
  40   }
  41   point operator / (double t) const{
  42     return point(x / t, y / t);
  43   }
  44 };
  45
  46 point circle3points(const point &a, const point &b, const point &c){
  47
  48 }
  49
  50 int main(){
  51   double x0, y0, x1, y1, x2, y2;
  52   while (scanf("%lf%lf%lf%lf%lf%lf", &x0, &y0, &x1, &y1, &x2, &y2)==6){
  53     point a(x0, y0), b(x1, y1), c(x2, y2);
  54
  55   }
  56   return 0;
  57 }