//+------------------------------------------------------------------+
//|                                                      ProjectName |
//|                                      Copyright 2020, CompanyName |
//|                                       http://www.companyname.net |
//+------------------------------------------------------------------+

input int birth_year ; // سال تولد


int calculate_age(int i_birth_year)
  {
   return 1404 - i_birth_year;
  }


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int OnInit()
  {
  int age = calculate_age(birth_year);
  
  if(age == 10){
  
  Print( " You are 10" );
  
  }else {
  
  Print ( " you are not 10 ");
  
  }







   return(INIT_SUCCEEDED);
  }





















//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int OnCalculate(const int32_t rates_total,
                const int32_t prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int32_t &spread[])
  {
//---

//--- return value of prev_calculated for next call
   return(rates_total);
  }

//+------------------------------------------------------------------+