在std中没有匹配的“操作符<<::操作符++(int)(0)”

#include <cstdio>
#include <cmath>
#include <cstring>
#include <ctime>
#include <iostream>
#include <algorithm>
#include <set>
#include <map>
#include <vector>
#include <sstream>
#include <typeinfo>

#define debug(args...) // Just strip off all debug tokens
using namespace std;
// CUT begin
#define debug(args...) {dbg,args;cout<<endl;}
struct debugger{template<typename T> debugger& operator ,(const T& v){cout<<v<<" ";return *this;}}dbg;
template <typename T1,typename T2> inline ostream& operator<<(ostream& os,const pair<T1,T2>& p){return os<<"("<<p.first<<", "<<p.second<<")";}
template<typename T>inline ostream&operator<<(ostream& os,const vector<T>& v){string delim="[";for(unsigned int i=0;i < v.size();i++){os<<delim<<v[i];delim=", ";}return os<<"]";}
template<typename T>inline ostream&operator<<(ostream& os,const set<T>& v){string delim="[";for (typename set<T>::const_iterator ii=v.begin();ii!=v.end();++ii){os<<delim<<*ii;delim=", ";}return os<<"]";}
template<typename T1,typename T2>inline ostream&operator<<(ostream& os,const map<T1,T2>& v){string delim="[";for (typename map<T1,T2>::const_iterator ii=v.begin();ii!=v.end();++ii){os<<delim<<*ii;delim=", ";}return os<<"]";}
// CUT end


class Vehicle
{
public:
    int n;
    Vehicle(int n):n(n){cout<<"Ctor Vehicle "<<n<<endl;}
    Vehicle(Vehicle& v):n(v.n){cout<<"Copy Ctor Vehicle "<<n<<endl;}
    virtual ~Vehicle(){cout<<"Dtor Vehicle "<<n<<endl;}
    virtual ostream& dump(ostream& os){return os<<"Vehicle("<<n<<")";}
    string to_str(){stringstream s; dump(s); return s.str();}
    Vehicle& operator++(){n++;return *this;}
    Vehicle operator++(int x){Vehicle v(*this); operator++(); return v;}
};

class Car: public Vehicle
{
public:
    Car(int n): Vehicle(n){cout<<"Ctor Car "<<n<<endl;}
    virtual ~Car(){cout<<"Dtor Car "<<n<<endl;}
    virtual ostream& dump(ostream& os){return os<<"Car("<<n<<")";}
    Car operator++(int x){Car v(*this); operator++(); return v;}
    Car& operator++(){n++; return *this;}
    /* data */
};
ostream& operator<<(ostream& os,  Vehicle& v)
{
    return v.dump(os);
}

int main(int argc, char const *argv[])
{
    Car c(10);
    // cout<<c++<<endl;
    cout<<c++<<endl;
    return 0;
}
#include <cstdio>
#include <cmath>
#include <cs