10195 - Knights of the round table/10195.cpp

   1 #include <iostream>
   2 #include <math.h>
   3 #include <cassert>
   4
   5 using namespace std;
   6
   7 main(){
   8   double a,b,c,s,r, temp;
   9   while (cin >> a >> b >> c){
  10     s = (a+b+c)/2;
  11     temp = s*(s-a)*(s-b)*(s-c);
  12     assert(temp >= 0);
  13     //cout << "s es : " << s << endl;
  14     if (s==0.0)
  15       r = 0.0;
  16     else
  17       r = sqrt(temp)/s;
  18     printf("The radius of the round table is: %0.3f\n", floor(r*1000+0.5)/1000);
  19   }
  20   return 0;
  21 }