Problem with the constructor of a class C++

Question

Good afternoon to all.

I am starting with C++ and I have a doubt about using a constructor inside other constructor in a class.

The code like this:

class Empleado{
   private:
   long dni;
   float sueldoBase;

   public:
   Empleado(){
    sueldoBase = 0;
   }

   Empleado(int dni){
    Empleado(); //here I want to replicate the info of the other constructor
    this->dni =dni;
   }
   void mostrarInfo(){
    cout<<"DNI : "<<dni<<"\nsueldo base : "<<sueldoBase<<endl; 
   }
};

int main(){
 Empleado John(66561234); 
 John.mostrarInfo();
 return 0;
}

When I get the value of sueldoBase in console it shows me random numbers instead of 0. Note: I know there is a way to use just one constructor but I need to do it with two.

Please help me. Greetings.