Questions from Beginners MQL4 MT4 MetaTrader 4 - page 6
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Good afternoon
Please help with a very simple (probably) question. There is a standard function:
What does "const void &" mean and how to use it? ? Even a simple attempt to write a similar function leads to a compilation error:
return ArraySize(array);
}
Compilation error: 'const' - illegal use of 'void' type
How can I use "const void &"correctly when writing my own code? Can it be done at all ?Good afternoon
Please help with a very simple (probably) question. There is a standard function:
What does "const void &" mean and how to use it? ? Even a simple attempt to write a similar function leads to a compilation error:
return ArraySize(array);
}
Compilation error: 'const' - illegal use of 'void' type
How to use "const void &"correctly when writing your code? Is it even possible?No way.
-----
Try the script,
I think you will understand it.
double array[10];
//+------------------------------------------------------------------+
//| Script program start function |
//+------------------------------------------------------------------+
void OnStart()
{
Print("количество элементов = ",ArraySize(array));
//----------------или
int size=ArraySize(array);
Print("количество элементов = ",size);
}
//+------------------------------------------------------------------+
Hello. I need tosend to api.binaryteam.ru from the indicator after the alert. What lines should be added to the indicator.mq4 file to send a line like http://api.binaryteam.ru/?request=signal&key=12345472300af900f431234561234567&formname=risefall&type_account=demo&symbol=frxUSDCHF&duration=5m&amount=3&bet=CALL&source=metatrader to api.binaryteam.ru after the alert.
There is an example of sending for advisors http://binaryteam.ru/addons/#api, when adding the lines to the file of the indicator.mq4
extern double bet=1;
extern int expiration=1;
extern string key = "12345472300af900f431234561234567" ;
extern string type_account = "demo";
extern bool Flag = false;
extern string bettype;
.....
int start() {
....
условие покупки {
.....
Alert("алерт индюка - BUY!!!");
bettype = "CALL";
Print("направление ставки: ",bettype);
Flag = true;
Print(BinaryTeam());
}
условие продажи {
.....
Alert(""алерт индюка - SELL!!!");
bettype = "PUT";
Print("направление ставки: ",bettype);
Flag = true;
Print(BinaryTeam());
}
}
bool BinaryTeam()
{
char post[],result[];
int res;
string headers;
//--- для работы с сервером необходимо добавить URL
//--- в список разрешенных URL (Главное меню->Сервис->Настройки, вкладка "Советники"):
string formname = "risefall";
string symbol = "frx" + Symbol();
string duration = IntegerToString(expiration) + "m";
string amount = DoubleToString(bet);
if(Flag==false)
{
Print("не задано направление торговли");
return(false);
}
//--- пример: http://api.binaryteam.ru/?request=signal&key=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX&formname=risefall&type_account=demo&symbol=frxUSDCHF&duration=5m&amount=3&bet=CALL&source=metatrader
//--- собираем строку для отправки
string send = "?request=signal" +
"&source=metatrader" +
"&type_account=" + type_account +
"&bet=" + bettype +
"&formname=" + formname +
"&date_start=now" +
"&symbol=" + symbol +
"&duration=" + duration +
"&barrier=0" +
"&amount=" + amount +
"&key=" + key;
Print(send);
ResetLastError();
int timeout=5000;
res = WebRequest("GET",url+send,NULL,NULL,timeout,post,0,result,headers);
if(res==-1)
{
Print("Ошибка в WebRequest. Код ошибки =",GetLastError());
MessageBox("Необходимо добавить адрес '"+url+"' в список разрешенных URL во вкладке 'Советники'","Ошибка",MB_ICONINFORMATION);
}
else
{
Print(CharArrayToString(result));
return(true);
}
Print("Непредвиденная ситуация");
return(false);
}
Writes 2016.11.16 13:50:01.783 Error in WebRequest. Error code =4060
how to send a request without aWebRequest function?
What programming language should I learn to program in mql4/mql5?
What programming language should I learn to program in mql4/mql5?
About the same as sending an order without "OrderSend"