How to initialize a double to the max value ? double VarMax = ???; - page 2

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//+------------------------------------------------------------------+
//|                                           TestDoubleValueMax.mq4 |
//|                                       Copyright © 2012, Pierre8r |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2012, Pierre8r"
#property link      ""

#define INF 0x6FFFFFFF 

//+------------------------------------------------------------------+
//| script program start function                                    |
//+------------------------------------------------------------------+
int start()
  {
//----
   double DOUBLE_MAX_VALUE = 1.7 * (MathPow(10,308));
   Alert("DOUBLE_MAX_VALUE  : ", DOUBLE_MAX_VALUE); 
   Alert("INF  : ", INF); 
  
//----
   return(0);
  }
//+------------------------------------------------------------------+

1.7 * (MathPow(10,308)); seen nearest of the max value.

  
//+------------------------------------------------------------------+
//| script program start function                                    |
//+------------------------------------------------------------------+
int start()
  {
//----
   double VarMax1 = 1.7976931348623158*MathPow(10,308); //last digit 8
   Alert("VarMax1 = ",VarMax1);
   double VarMax2 = 1.7976931348623159*MathPow(10,308); //last digit 9
   Alert("VarMax2 = ",VarMax2);
//----
   return(0);
  }

 
WHRoeder:
I use this: It's not infinite but larger than you'll find in FX and it can be used in signed computations.

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you can just


#define MAX_DOUBLE 1.7976931348623158e308
 
bradleycuster:
Useless. You can just use DBL_MAX, which was not available at the time this topic was created.
 
  1. Don't dredge up old posts, a lot has changed since Build 600 and Higher (17.02.2014)
  2. Write self-documenting code.
    //{ Typedefs
#define  PRICE    double         // A PRICE
#define     PRICE_MAX   (PRICE)EMPTY_VALUE
#define     PRICE_MIN   (PRICE)0
#define     CHANGE      PRICE    // Difference of two prices.
#define  INDEX    uint           // Zero based.
   #define  INV_INDEX      UINT_MAX
#define  COUNT    uint           //  One based.
   #define  INV_COUNT      UINT_MAX
#define  TICKET   int
   #define  INV_TICKET  EMPTY
#define  MONEY    double
#define  SYMBOL   string
#define  MAX_DATETIME    D'3000.12.31 23:59:59'
//} Typedefs

 
Alain Verleyen:
Useless. You can just use DBL_MAX, which was not available at the time this topic was created.
quite true
12
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