//+------------------------------------------------------------------+
//|                                                    GoodTime2.mq5 |
//|                                  Copyright 2021, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+

#property copyright "Copyright 2021, MetaQuotes Ltd."
#property link      "https://www.mql5.com"
#property version   "1.00"

// 保证输入参数在script 被运行的时候，弹出对话框
#property script_show_inputs

// input ： 这是一个外部输入的param 
// uint  ： unsigned integer
input uint GreetingHour = 0; // Greeting Hour (0-23)

//+------------------------------------------------------------------+
//| Return greeting for given time of day (hour)                     |
//+------------------------------------------------------------------+
string Greeting(int hour)
{
   string messages[3] = {"Good morning", "Good day", "Good evening"};
   return messages[hour % 24 / 8];
}

//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
{
   // Print to Experts console
   Print(Greeting(GreetingHour), ", ", Symbol());
   
   // Comment on the chart
   Comment(Greeting(GreetingHour), ", ", Symbol());
   
   // Popup 
   Alert(Greeting(GreetingHour), ", ", Symbol());
}

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