Stdlib.mqh question

repxl 2016.04.29 09:37

hello, so i included the #include <stdlib.mqh>

i wanna use the std::map from this tutorial http://thispointer.com/stdmap-tutorial-part-1-usage-detail-with-examples/

but when i trying to write std::map<std::string, int> mapOfWords; i getting errors ...

please can somebody help me that uses c++ library stdlib ? it's really hard to find a solution all using the predefined arrays from mq4 but really i need map !!

William Roeder 2016.04.29 10:35 #1

repxl:

hello, so i included the #include <stdlib.mqh>

i wanna use the std::map from this tutorial http://thispointer.com/stdmap-tutorial-part-1-usage-detail-with-examples/

Have you bothered to look what is in stdlib.mqh?	#import "stdlib.ex4" string ErrorDescription(int error_code); int RGB(int red_value,int green_value,int blue_value); bool CompareDoubles(double number1,double number2); string DoubleToStrMorePrecision(double number,int precision); string IntegerToHexString(int integer_number); That's it.

Have you bothered to look what is in stdlib.mqh?

#import "stdlib.ex4"
string ErrorDescription(int error_code);
int    RGB(int red_value,int green_value,int blue_value);
bool   CompareDoubles(double number1,double number2);
string DoubleToStrMorePrecision(double number,int precision);
string IntegerToHexString(int integer_number);

That's it.

Your link points to the C++ standard template library. The is MQL4 not C++ There is no STD:: anything.	//\| Mql4 is like C++ except: no typedefs or namespaces, no pointers \| //\| to POD (so no iterators,) no operator(), operator*, or \| //\| operator-> (latter two are unnecessary as pointers are \| //\| automatically dereferenced when used.) No implicit conversions \| //\| (operator bool), no Koenig lookup, can't return references, no \| //\| dynamic cast (yet build 950,) no exceptions, no class friends, no\| //\| multiple inheritance. No stand alone operatorXX() functions (yet \| //\| build 950.) Can't use template<class X...> must be template \| //\| <typename x...>. Given a f(const T&){} f(123) or f(f2()) doesn't \| //\| compile (Build 950,) must have a actual variable - this means \| //\| templates can not deduce their data types for temporary \| //\| variables. Structures must be passed by reference. \|

Your link points to the C++ standard template library. The is MQL4 not C++ There is no STD:: anything.

//| Mql4 is like C++ except: no typedefs or namespaces, no pointers  |
//| to POD (so no iterators,) no operator(), operator*, or           |
//| operator-> (latter two are unnecessary as pointers are           |
//| automatically dereferenced when used.) No implicit conversions   |
//| (operator bool), no Koenig lookup, can't return references, no   |
//| dynamic cast (yet build 950,) no exceptions, no class friends, no|
//| multiple inheritance. No stand alone operatorXX() functions (yet |
//| build 950.) Can't use template<class X...> must be template      |
//| <typename x...>. Given a f(const T&){} f(123) or f(f2()) doesn't |
//| compile (Build 950,) must have a actual variable - this means    |
//| templates can not deduce their data types for temporary          |
//| variables. Structures must be passed by reference.               |

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