bool fx(int a,int b){                                                                  <- Gate variants should return boolean value, not integer.
  float f= static_cast<double>(a) / b * 100;
  Cout() <<"avaliando " << a << " " << b << " % " << Format("%.1f%%", f ) << EOL;
  return boolean_condition;                                                           // <---- boolean_condition is up to you to define. If it is true, it will stop progressing. If false (default) it will continue the progress. 
}