P28118: Representant comercial

#include <iostream>
#include <string>
#include <cmath>
using namespace std;


double distancia(double x1, double y1, double x2, double y2) {
    double dist, x, y;
    x = x1 - x2;
    y = y1 - y2;
    dist = sqrt(x*x + y*y);
    return dist;
}

//Pre: Llegeix diferents punts d'un trajecte
//Post: Escriu la distància del recorregut
int main() {
    cout.setf(ios::fixed);
    cout.precision(4);
    string ruta;
    double x, y, aux1, aux2;
    double x1, x2, y1, y2;
    while (cin >> ruta) {
        bool fiseq = false;
        double t = 0;
        cin >> x >> y;
        aux1 = x;
        aux2 = y;
        x1 = x;
        y1 = y;
        while (not fiseq && cin >> x >> y) {
            x2 = x1;
            y2 = y1;
            x1 = x;
            y1 = y;
            t = t + distancia(x1, y1, x2, y2);
            if (x == aux1 && y == aux2) fiseq = true;
        }
        cout << "Trajecte " << ruta << ": " << t << endl;
    }
}