Stos obiektowo – kilka błędów kompilacji

#include <iostream>
#include <cstdlib>

using namespace std;

class stos{
    private:
    int *tab;
    public:
    stos(){}
    stos(int t){
        this->tab=new int(t);
    }

};

int main()
{
    stos tro=new stos(6);
    return 0;
}

error: invalid conversion from 'stos*' to 'int' [-fpermissive]
note: initializing argument 1 of 'stos::stos(int)'

stos * tro = new stos(6);