The Knights of the Round Table

// The Knights of the Round Table.cpp : Defines the entry point for the console application.//#include "stdafx.h"using namespace std;int _tmain(int argc, _TCHAR* argv[]){double a, b,c;while(cin>>a>>b>>c){if(a==EOF)break;double A=0;double sinA=0;double r=0;double tmp=(a*a-b*b-c*c)/(-2*b*c);A=acos(tmp);sinA=sin(A);r=(b*c*sinA)/(a+b+c);cout<<"The radius of the round table is: "<<r<<"/n";}system("pause");return 0;}