NormalizeDouble
NormalizeDouble
Rounding floating point number to a specified accuracy.
double NormalizeDouble(
double value, // normalized number
int digits // number of digits after decimal point
);Parameters
- value
[in] Value with a floating point.
- digits
[in] Accuracy format, number of digits after point (0-8).
Return Value
Value of double type with preset accuracy.
Note
Calculated values of StopLoss, TakeProfit, and values of open prices for pending orders must be normalized with the accuracy, the value of which can be obtained by Digits().
Please note that when output to Journal using the Print() function, a normalized number may contain a greater number of decimal places than you expect. For example, for:
double a=76.671; // A normalized number with three decimal places
Print("Print(76.671)=",a); // Output as is
Print("DoubleToString(a,8)=",DoubleToString(a,8)); // Output with a preset accuracy
you will have the following in the terminal:
| DoubleToString(a,8)=76.67100000
Print(76.671)=76.67100000000001 |
Example:
double pi=M_PI;
Print("pi = ",DoubleToString(pi,16));
double pi_3=NormalizeDouble(M_PI,3);
Print("NormalizeDouble(pi,3) = ",DoubleToString(pi_3,16))
;
double pi_8=NormalizeDouble(M_PI,8);
Print("NormalizeDouble(pi,8) = ",DoubleToString(pi_8,16));
double pi_0=NormalizeDouble(M_PI,0);
Print("NormalizeDouble(pi,0) = ",DoubleToString(pi_0,16));
/*
Result:
pi= 3.1415926535897931
NormalizeDouble(pi,3)= 3.1419999999999999
NormalizeDouble(pi,8)= 3.1415926499999998
NormalizeDouble(pi,0)= 3.0000000000000000
*/See also
DoubleToString, Real types (double, float), Reduction of types,
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