MQL5 - Problem about StringToCharArray and CharArrayToString Functions

[AED71]

int OnInit()
  {
           
      string result="20140201";  // The seperated strings must be --->  2014 02 01   but the result is  ---> 2014 20 20
      Print("The date = ",result);
      
      // ----- Seperate Year -------------------
      uchar date_yearx[]={};  
      StringToCharArray(result,date_yearx,0,4,65001);
      string date_year=CharArrayToString(date_yearx,0,4,65001);
      Print("Date_year = ",date_year);

      // ----- Seperate month -------------------
      uchar date_monthx[]={};  
      StringToCharArray(result,date_monthx,4,2,65001);
      string date_month=CharArrayToString(date_monthx,4,2,65001);
      Print("Date_month= ",date_month);

      // ----- Seperate day -------------------
      uchar date_dayx[]={};  
      StringToCharArray(result,date_dayx,6,2,65001);
      string date_day=CharArrayToString(date_dayx,6,2,65001);
      Print("Date_day = ",date_day);

   

   return(INIT_SUCCEEDED);
  }

Hello, I would like to seperate year, month and day from date but the code does not work properly. Could you please help me.

[Alain Verleyen]

Why do you want to use StringToCharArray() and CharArrayToString() at all ?

You can either convert your string to a datetime with StringToTime() or extract your data directly from the string using StringSubstr().

[AED71]

I'm willing to convert a historical data txt file to MT5. The text file structure is as follows:

201402101130,780,00,780,00,779,75,779,75,77,6004,1

I'm reading from file and willing to convert to below structure and write to a new file as date, time, open,close,high,low,volume

   2014.02.01 , 11:30 , 780.0 , 780,0, 779.75, 779.75 , 6004

So I need more string operations.

I think function always starts with start=0 altough I'm willng to use a different position.

int  StringToCharArray( 
   string  text_string,         // source string 
   uchar&  array[],             // array 
   int     start=0,             // starting position in the array 
   int     count=-1             // number of symbols 
   uint    codepage=CP_ACP      // code page 
   );

Could you please suggest me a function/method so that I could split and than merge the strings according to my needs.

Thank you.

[Alain Verleyen]

AED71 #:

I'm willing to convert a historical data txt file to MT5. The text file structure is as follows:

201402101130,780,00,780,00,779,75,779,75,77,6004,1

I'm reading from file and willing to convert to below structure and write to a new file as date, time, open,close,high,low,volume

   2014.02.01 , 11:30 , 780.0 , 780,0, 779.75, 779.75 , 6004

So I need more string operations.

I think function always starts with start=0 altough I'm willng to use a different position.

Could you please suggest me a function/method so that I could split and than merge the strings according to my needs.

Thank you.

I already answered you. You don't need to user char array at all.

Use StringSplit(), StringSubstr(). StringToTime(), StringToDouble()...

[Fernando Carreiro]

AED71 #: I'm willing to convert a historical data txt file to MT5. The text file structure is as follows: 201402101130,780,00,780,00,779,75,779,75,77,6004,

Besides Alain's answer in the previous post, I would also like to add that you can read the file as a CSV and have the fields automatically split up as well.

[AED71]

Hi Alain and Fernando, thank you for your help and comments. I solved the issue. Regards.

[William Roeder]

AED71 #: I solved the issue.

Don't do that. Someone searching might find this thread and still be clueless. What was the problem? What solved what?

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