foreach

extern "C" void f9(int a){

}

#if 0

#include <vector>

using namespace std;

int main(int argc, char* *argv)

{

    vector<int> vct;

    vct.push_back(100);

    vct.push_back(90);

    for ( auto const & value : vct )

    {

        f9(value);

    }

    return 1;

}

#endif

struct B{

    int k;

    B(int z) : k(z){}

    bool operator != (const B& b){

        return k != b.k;

    }

    B operator ++ (){

         k++;

        return *this;

    }

    int& operator *() {

        return k;

    }

};

struct A{

    B begin() {return  B(0);}

    B end() {return B(3);}

};

#include "stdio.h"

int main(){

    A a;

    for (auto const &p : a){

        printf("%d\n", p);

    }

}