GetArrayItemValue_MT4外汇EA圈_投资圈

GetArrayItemValue

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楼主admin 圈主
2019-05-05 11:43

#property copyright "Copyright ?2005-2016, metaQuotes Software Corp."
#property link    "http://www.metaquotes.net/"

#import "DLLSample.dll"
int GetIntValue(int);
double GetDoublevalue(double);
string GetStringValue(string);
double GetArrayItemValue(double &arr[],int,int);
bool SetArrayItemValue(double &arr[],int,int,double);
double GetRatesItemValue(MqlRates &rates[],int,int,int);
#import

#define TIME_INDEX 0
#define OPEN_INDEX 1
#define LOW_INDEX 2
#define HIGH_INDEX 3
#define CLOSE_INDEX  4
#define VOLUME_INDEX 5
//+------------------------------------------------------------------+
//| expert initialization function                                  |
//+------------------------------------------------------------------+
int init()
  {
double ret,some_value=10.5;
string sret;
int cnt;
//--- simple dll-functions call
cnt=GetIntValue(int(some_value));
Print("Returned value is ",cnt);

ret=GetDoublevalue(some_value);
Print("Returned value is ",ret);

sret=GetStringValue("some string");
Print("Returned value is ",sret);
//---
return(0);
  }
//+------------------------------------------------------------------+
//| array functions call                                           |
//+------------------------------------------------------------------+
int start()
  {
double price;
double arr[5]={1.5,2.6,3.7,4.8,5.9 };
MqlRates rates[];
//--- get first item from passed array
price=GetArrayItemValue(arr,5,0);
Print("Returned from arr[0] ",price);
//--- change second item in the passed array
if(SetArrayItemValue(arr,5,1,1234.5)==true)
   Print("Changed to ",arr[1]);
//--- get current close
ArrayCopyRates(rates);
price=GetRatesItemValue(rates,Bars,0,CLOSE_INDEX);
Print("Returned from Close ",price);
//---
return(0);
  }
//+------------------------------------------------------------------+

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