collection Hetero, C++ (gcc)

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//Title of this code
//g++  4.9.2
#include<string>
#include <iostream>
#include<vector>

using namespace std;

class vehicule {
 
 protected:
 int prix;
 int vitesse ;
 string modele;
 string constructeur ; 
 
 public:
   vehicule(int,int,string,string);
   virtual ~vehicule(){};
   virtual void print();
   
   friend ostream& operator<<(ostream&,const vehicule&);
};

vehicule::vehicule(int p,int v,string c,string m){prix=p; vitesse=v;constructeur=c; modele=m;}

ostream& operator<<(ostream& out,const vehicule& veh)
{
 
out <<" Le type du vehicule est inderterminé et possede les caracteristiques suivantes: \n"<<"Constructeur: "<<veh.constructeur<<endl
    <<"Modele: "<<veh.modele<<endl<<"Vitesse: "<<veh.vitesse<<"Km/h"<<endl<<"Prix: "<<veh.prix<<"$"<<endl;
  return out ;

}

void vehicule::print()
 {
 cout<<*this;
 }
 
 
 class voiture:public vehicule{
 
  public:
     voiture(int,int,string,string);
    
     void print();
 };
 
 
  voiture::voiture(int p,int v,string c,string m):
  vehicule(p,v,c,m){ }
 
 void voiture::print(){
 
 cout <<"Les informations sur la voiture sont: \n"<<"Constructeur: "<<this->constructeur<<endl
    <<"Modele: "<<this->modele<<endl<<"Vitesse: "<<this->vitesse<<"Km/h"<<endl<<"Prix: "<<this->prix<<"$"<<endl;
 }

class moto: public vehicule{
 
 public:
    moto(int,int,string,string);
   
    void print();
 };

moto::moto(int p,int v,string c,string m):
  vehicule(p,v,c,m){ }

void moto::print(){
 
 cout <<"Les informations sur la moto sont: \n"<<"Constructeur: "<<this->constructeur<<endl
    <<"Modele: "<<this->modele<<endl<<"Vitesse: "<<this->vitesse<<"Km/h"<<endl<<"Prix: "<<this->prix<<"$"<<endl;
 }

void show(vehicule*V){
 
 V->print();
 }

int main()
{
      vector<vehicule*>collection;
     
      voiture v1(15374,420,"Citroen","Citroen Berlingo")  ;  
      voiture v2(16425,500,"Citroen","Citroen C-zero");
      voiture v3(20555,700,"Caparo","Caparo T1");
      voiture v4(5000,250,"Chevrolet","Chevrolet Camaro");
      
      moto m1(1574,420,"Honda","Honda CRF50F")  ;  
      moto m2(1642,500,"Honda","Honda CR250");
      moto m3(2055,700,"Kawasaki","Kawasaki KX450F");
      moto m4(500,250,"KTM","KTM SX65");
      
      collection.push_back(&v1);
      collection.push_back(&v2);
      collection.push_back(&v3);
      collection.push_back(&v4);
      collection.push_back(&m1);
      collection.push_back(&m2);
      collection.push_back(&m3);
      collection.push_back(&m4);
 
 for(int i=0;i<collection.size();i++){
  show(collection[i]);
   cout<<endl;
 } 
    
}

Show compiler warnings [ + ] Compiler args [ + ] Show input
Compilation time: 0.62 sec, absolute running time: 0.14 sec, cpu time: 0 sec, memory peak: 4 Mb, absolute service time: 0.78 sec