#include <iostream>
#include <cmath>
#include <cstdio>
using namespace std;
class triangle {
public:
    triangle();
    triangle(double x1_, double y1_, double x2_, double y2_, double x3_, double y3_) {
        x1 = x1_;
        y1 = y1_;
        x2 = x2_;
        y2 = y2_;
        x3 = x3_;
        y3 = y3_;
        a = length(x1, y1, x2, y2);
        b = length(x2, y2, x3, y3);
        c = length(x3, y3, x1, y1);
    }
    void operator+(float*);
    double length(double, double, double, double);
    float medianatoQ(float,float,float);
    float medianatoW(float,float,float);
    float medianatoE(float,float,float);
    bool isRight();
    double GetLen(int);
private:
    double x1, y1;
    double x2, y2;
    double x3, y3;
    double a, b, c;
};

double triangle::length(double x1_, double y1_, double x2_, double y2_) {
    return sqrt((x2_ - x1_) * (x2_ - x1_) + (y2_ - y1_) * (y2_ - y1_));
}
/*
bool triangle::isRight() {
    if ((sqrt(a * a + b * b) == c) || (sqrt(a * a + c * c) == b))
        return true;
    return false;
}
*/
double triangle::GetLen(int k) {
    double arr[3] = {a, b, c};
    return arr[k - 1];
}

float triangle::medianatoQ(float q,float w,float e){
return 0.5*sqrt((2*w*w)+(2*e*e)-(q*q));}
float triangle::medianatoW(float q,float w,float e){
return 0.5*sqrt((2*q*q)+(2*e*e)-(w*w));}
float triangle::medianatoE(float q,float w,float e){
return 0.5*sqrt((2*q*q)+(2*w*w)-(e*e));}
int main() {

    triangle trg(1.0, 0.0, 4.0, 1.0, 1.0, 1.0);
    float q,w,e;
    q=trg.GetLen(1);
    w=trg.GetLen(2);
    e=trg.GetLen(3);
    std::cout<<"a:"<<q<<"\t"<<"b:"<<w<<"\t"<<"c:"<<e<<endl;

    if(q < w && q < e)
      std::cout<<"medianaA:"<<trg.medianatoQ(q,w,e)<<endl;
    else if(w < q && q < e)
         std::cout<<"medianaB:"<<trg.medianatoW(q,w,e)<<endl;
    else if(e < w && e < q)
       std::cout<<"medianaC:"<<trg.medianatoE(q,w,e)<<endl;







    //std::cout << trg.isRight() << " " << trg.GetLen(3);

    return 0;
}