60 lines
2.5 KiB
MQL5
60 lines
2.5 KiB
MQL5
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//+------------------------------------------------------------------+
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//| NormalizeDouble_errors.mq5 |
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//| Copyright <20> 2018, Amr Ali |
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//| https://www.mql5.com/en/users/amrali |
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//+------------------------------------------------------------------+
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#property copyright "Copyright <20> 2018, Amr Ali"
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#property link "https://www.mql5.com/en/users/amrali"
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#property version "4.0"
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#property description "Script to demonstrate errors in the results of NormalizeDouble()."
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#include <math_utils.mqh>
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#define PRINT(A) Print(#A + " = ", (A))
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//+------------------------------------------------------------------+
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//| |
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//+------------------------------------------------------------------+
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void OnStart()
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{
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//--- NormalizeDouble(num, digits) gives unexpected results with many numbers (result maybe off by +/- 1 epsilon).
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Print("** NormalizeDouble(num, digits) Test:");
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PRINT( NormalizeDouble (1.005437, 5) == 1.00544);
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PRINT( NormalizeDouble (1.215143, 5) == 1.21514);
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PRINT( NormalizeDouble (1.768533, 5) == 1.76853);
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PRINT( NormalizeDouble (1.30482, 5) == 1.30482);
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PRINT( NormalizeDouble (1.62457, 5) == 1.62457);
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PRINT( NormalizeDouble (1.80181, 5) == 1.80181);
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//--- Alternatively, use Round(num, digits) from 'math_utils' library to get the correct results.
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Print(" ");
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Print("** Round(num, digits) Test:");
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PRINT( Round( 1.005437, 5) == 1.00544);
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PRINT( Round( 1.215143, 5) == 1.21514);
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PRINT( Round( 1.768533, 5) == 1.76853);
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PRINT( Round( 1.30482, 5) == 1.30482);
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PRINT( Round( 1.62457, 5) == 1.62457);
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PRINT( Round( 1.80181, 5) == 1.80181);
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}
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//+------------------------------------------------------------------+
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// Output:
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/*
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** NormalizeDouble(num, digits) Test:
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NormalizeDouble(1.005437,5)==1.00544 = false
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NormalizeDouble(1.215143,5)==1.21514 = false
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NormalizeDouble(1.768533,5)==1.76853 = false
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NormalizeDouble(1.30482,5)==1.30482 = false
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NormalizeDouble(1.62457,5)==1.62457 = false
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NormalizeDouble(1.80181,5)==1.80181 = false
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** Round(num, digits) Test:
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Round(1.005437,5)==1.00544 = true
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Round(1.215143,5)==1.21514 = true
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Round(1.768533,5)==1.76853 = true
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Round(1.30482,5)==1.30482 = true
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Round(1.62457,5)==1.62457 = true
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Round(1.80181,5)==1.80181 = true
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*/
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