Function with variable number of parameters

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Hi everyone.
I need to use one fuction, but with a varible numbers of parameters, the quntity of parameters is known in advance.

In C++ for example, you use kind of void func(int a, int b, ...) and it's simple. But unfortunately I havent found any information about it in MQL4.
Any tips, how to do it?

 
RomanRott: I need to use one fuction, but with a varible numbers of parameters, the quntity of parameters is known in advance. In C++ for example, you use kind of void func(int a, int b, ...) and it's simple. But unfortunately I havent found any information about it in MQL4. Any tips, how to do it?

It is currently not possible to create user defined MQL functions with a variable number of parameters. Only built-in functions can have that possibility.

 
Not possible, but with unique data types, default parameters, and overloading you can come close. Example of a simple ATR class were the constructor takes a symbol, timeframe, and period, where all are optional.
class    ATR{
 public:
            ATR(COUNT len=14)  : mSymbol(_Symbol), mLength(len),        // cTor
                                 mTF( ENUM_TIMEFRAMES(_Period) ){}
            ATR(ENUM_TIMEFRAMES tf, COUNT len=14)                       // cTor
                               : mSymbol(_Symbol), mLength(len), mTF(tf){}
            ATR(SYMBOL sym, ENUM_TIMEFRAMES tf=0, COUNT len=14)         // cTor
                               : mSymbol(sym), mLength(len), mTF(tf){}
   PRICE    get(INDEX iBar){  return   iATR(mSymbol, mTF, mLength, iBar);      }
 private:
   SYMBOL               mSymbol;
   COUNT                mLength;
   ENUM_TIMEFRAMES      mTF;
}; // ATR
 
RomanRott:

Hi everyone.
I need to use one fuction, but with a varible numbers of parameters, the quntity of parameters is known in advance.

In C++ for example, you use kind of void func(int a, int b, ...) and it's simple. But unfortunately I havent found any information about it in MQL4.
Any tips, how to do it?

Do the overloading
 

You can also create a cascade of chained methods by returning this pointer...

   template<typename T1>
   String*    Format(T1) { ...; return &this;}
   
   template<typename T1,typename T2>
   String*    Format(T1 var1,T2 var2)
   {
      return Format(var1).Format(var2);
   }
   
   template<typename T1,typename T2,typename T3>
   String*     Format(T1 var1,T2 var2,T3 var3)
   {
      return Format(var1,var2).Format(var3);
   }
   
   template<typename T1,typename T2,typename T3,typename T4>
   String*  Format(T1 var1,T2 var2,T3 var3,T4 var4)
   {   
      return  Format(var1,var2,var3).Format(var4);
   }
   
   template<typename T1,typename T2,typename T3,typename T4,typename T5>
   String*     Format(T1 var1,T2 var2,T3 var3,T4 var4,T5 var5)
   {
      return  Format(var1,var2,var3,var4).Format(var5);
   }
 

Simple

Use ARRAY

double theArray[];

int FunVariableParams( int abc, double &theArray[]){

   ... do something

 }
 
Hely Rojas:

Simple

Use ARRAY

overload function is the best way

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