ValueMethod

Applies to:Fast Math Parser

Class:uCalc.Item

Returns the value (default double precision) associated with a uCalc.Item

Syntax

Value()

Remarks

Use this to retrieve the Double precision value associated with a variable.

Example 1: Retrieving an item value by explicit data type

VB
C#
Delphi
C++
VC++.NET


          
Dim var = uc.DefineVariable("Var = 1.25")
Dim ByteVar = uc.DefineVariable("ByteVar As Byte = -1")
Dim Int16Var = uc.DefineVariable("Int16Var As Int16 = 456")
Dim Int32Var = uc.DefineVariable("Int32Var As Int32 = Int16u(-1)")
Dim Int64Var = uc.DefineVariable("Int64Var = Int64(55.2)")
Dim SingleVar = uc.DefineVariable("SingleVar As Single = Single(1.0000000001)-1")
Dim DoubleVar = uc.DefineVariable("DoubleVar As Double = Double(1.0000000001)-1")
Dim StringVar = uc.DefineVariable("StringVar = 'Just a test'"): ' Defaults to string when there are quotes
Dim PointerVar = uc.DefineVariable("PtrVar As Double Ptr = AddressOf(DoubleVar)")
      
Console.WriteLine("Var value: " + var.Value()) ' Returns "Var value: 1.25"      
Console.WriteLine("ByteVar value: " + CInt(ByteVar.ValueByte())) ' Returns "ByteVar value: 255"
Console.WriteLine("Int16Var value: " + Int16Var.ValueInt16()) ' Returns "Int16Var value: 456"
Console.WriteLine("Int32Var value: " + Int32Var.ValueInt32()) ' Returns "Int32Var value: 65535"
Console.WriteLine("Int64Var value: " + Int64Var.ValueInt64()) ' Returns "Int64Var value: 55"
Console.WriteLine("SingleVar value: " + SingleVar.ValueSng()) ' Returns "SingleVar value: 0"
Console.WriteLine("DoubleVar value: " + DoubleVar.ValueDbl()) ' Returns "DoubleVar value: 1e-10"
Console.WriteLine("StringVar value: " + StringVar.ValueStr()) ' Returns "StringVar value: Just a test"
' The values in the two lines below should match although their specific value is not known beforehand
Console.Write("PointerVar value: "): Console.WriteLine(PointerVar.ValuePtr())
Console.Write("DoubleVar address: "): Console.WriteLine(DoubleVar.ValueAddr())
Console.WriteLine(PointerVar.ValuePtr())


          
var var = uc.DefineVariable("Var = 1.25");
var ByteVar = uc.DefineVariable("ByteVar As Byte = -1");
var Int16Var = uc.DefineVariable("Int16Var As Int16 = 456");
var Int32Var = uc.DefineVariable("Int32Var As Int32 = Int16u(-1)");
var Int64Var = uc.DefineVariable("Int64Var = Int64(55.2)");
var SingleVar = uc.DefineVariable("SingleVar As Single = Single(1.0000000001)-1");
var DoubleVar = uc.DefineVariable("DoubleVar As Double = Double(1.0000000001)-1");
var StringVar = uc.DefineVariable("StringVar = 'Just a test'"); // Defaults to string when there are quotes
var PointerVar = uc.DefineVariable("PtrVar As Double Ptr = AddressOf(DoubleVar)");

Console.WriteLine("Var value: " + var.Value()); // Returns "Var value: 1.25";      
Console.WriteLine("ByteVar value: " + (int)ByteVar.ValueByte()); // Returns "ByteVar value: 255";
Console.WriteLine("Int16Var value: " + Int16Var.ValueInt16()); // Returns "Int16Var value: 456";
Console.WriteLine("Int32Var value: " + Int32Var.ValueInt32()); // Returns "Int32Var value: 65535";
Console.WriteLine("Int64Var value: " + Int64Var.ValueInt64()); // Returns "Int64Var value: 55";
Console.WriteLine("SingleVar value: " + SingleVar.ValueSng()); // Returns "SingleVar value: 0";
Console.WriteLine("DoubleVar value: " + DoubleVar.ValueDbl()); // Returns "DoubleVar value: 1e-10";
Console.WriteLine("StringVar value: " + StringVar.ValueStr()); // Returns "StringVar value: Just a test";
// The values in the two lines below should match although their specific value is not known beforehand
Console.Write("PointerVar value: "); Console.WriteLine(PointerVar.ValuePtr());
Console.Write("DoubleVar address: "); Console.WriteLine(DoubleVar.ValueAddr());
Console.WriteLine(PointerVar.ValuePtr());


          
//var Var = uc.DefineVariable('Var = 1.25');
//var ByteVar = uc.DefineVariable('ByteVar As Byte = -1');
//var Int16Var = uc.DefineVariable('Int16Var As Int16 = 456');
//var Int32Var = uc.DefineVariable('Int32Var As Int32 = Int16u(-1)');
//var Int64Var = uc.DefineVariable('Int64Var = Int64(55.2)');
//var SingleVar = uc.DefineVariable('SingleVar As Single = Single(1.0000000001)-1');
//var DoubleVar = uc.DefineVariable('DoubleVar As Double = Double(1.0000000001)-1');
//var StringVar = uc.DefineVariable('StringVar = "Just a test"'); // Defaults to string when there are quotes
//var PointerVar = uc.DefineVariable('PtrVar As Double Ptr = AddressOf(DoubleVar)');
      
      WriteLn('Var value: ' + var.Value()); // Returns 'Var value: 1.25';      
      WriteLn('ByteVar value: ' + CInt(ByteVar.ValueByte())); // Returns 'ByteVar value: 255';
      WriteLn('Int16Var value: ' + Int16Var.ValueInt16()); // Returns 'Int16Var value: 456';
      WriteLn('Int32Var value: ' + Int32Var.ValueInt32()); // Returns 'Int32Var value: 65535';
      WriteLn('Int64Var value: ' + Int64Var.ValueInt64()); // Returns 'Int64Var value: 55';
      WriteLn('SingleVar value: ' + SingleVar.ValueSng()); // Returns 'SingleVar value: 0';
      WriteLn('DoubleVar value: ' + DoubleVar.ValueDbl()); // Returns 'DoubleVar value: 1e-10';
      WriteLn('StringVar value: ' + StringVar.ValueStr()); // Returns 'StringVar value: Just a test';
      // The values in the two lines below should match although their specific value is not known beforehand
      Write('PointerVar value: '); WriteLn(PointerVar.ValuePtr());
      Write('DoubleVar address: '); WriteLn(DoubleVar.ValueAddr());
      WriteLn(PointerVar.ValuePtr());


          
auto var = uc.DefineVariable("Var = 1.25");
auto ByteVar = uc.DefineVariable("ByteVar As Byte = -1");
auto Int16Var = uc.DefineVariable("Int16Var As Int16 = 456");
auto Int32Var = uc.DefineVariable("Int32Var As Int32 = Int16u(-1)");
auto Int64Var = uc.DefineVariable("Int64Var = Int64(55.2)");
auto SingleVar = uc.DefineVariable("SingleVar As Single = Single(1.0000000001)-1");
auto DoubleVar = uc.DefineVariable("DoubleVar As Double = Double(1.0000000001)-1");
auto StringVar = uc.DefineVariable("StringVar = 'Just a test'"); // Defaults to string when there are quotes
auto PointerVar = uc.DefineVariable("PtrVar As Double Ptr = AddressOf(DoubleVar)");

cout << "Var value: " << var.Value() << endl; // Returns "Var value: 1.25";      
cout << "ByteVar value: " << (int)ByteVar.ValueByte() << endl; // Returns "ByteVar value: 255";
cout << "Int16Var value: " << Int16Var.ValueInt16() << endl; // Returns "Int16Var value: 456";
cout << "Int32Var value: " << Int32Var.ValueInt32() << endl; // Returns "Int32Var value: 65535";
cout << "Int64Var value: " << Int64Var.ValueInt64() << endl; // Returns "Int64Var value: 55";
cout << "SingleVar value: " << SingleVar.ValueSng() << endl; // Returns "SingleVar value: 0";
cout << "DoubleVar value: " << DoubleVar.ValueDbl() << endl; // Returns "DoubleVar value: 1e-10";
cout << "StringVar value: " << StringVar.ValueStr() << endl; // Returns "StringVar value: Just a test";
// The values in the two lines below should match although their specific value is not known beforehand
cout << "PointerVar value: "; cout << PointerVar.ValuePtr() << endl;
cout << "DoubleVar address: "; cout << DoubleVar.ValueAddr() << endl;
cout << PointerVar.ValuePtr() << endl;


          
auto var = uc.DefineVariable("Var = 1.25");
auto ByteVar = uc.DefineVariable("ByteVar As Byte = -1");
auto Int16Var = uc.DefineVariable("Int16Var As Int16 = 456");
auto Int32Var = uc.DefineVariable("Int32Var As Int32 = Int16u(-1)");
auto Int64Var = uc.DefineVariable("Int64Var = Int64(55.2)");
auto SingleVar = uc.DefineVariable("SingleVar As Single = Single(1.0000000001)-1");
auto DoubleVar = uc.DefineVariable("DoubleVar As Double = Double(1.0000000001)-1");
auto StringVar = uc.DefineVariable("StringVar = 'Just a test'"); // Defaults to string when there are quotes
auto PointerVar = uc.DefineVariable("PtrVar As Double Ptr = AddressOf(DoubleVar)");

Console::WriteLine("Var value: " + var.Value()); // Returns "Var value: 1.25";      
Console::WriteLine("ByteVar value: " + (int)ByteVar.ValueByte()); // Returns "ByteVar value: 255";
Console::WriteLine("Int16Var value: " + Int16Var.ValueInt16()); // Returns "Int16Var value: 456";
Console::WriteLine("Int32Var value: " + Int32Var.ValueInt32()); // Returns "Int32Var value: 65535";
Console::WriteLine("Int64Var value: " + Int64Var.ValueInt64()); // Returns "Int64Var value: 55";
Console::WriteLine("SingleVar value: " + SingleVar.ValueSng()); // Returns "SingleVar value: 0";
Console::WriteLine("DoubleVar value: " + DoubleVar.ValueDbl()); // Returns "DoubleVar value: 1e-10";
Console::WriteLine("StringVar value: " + StringVar.ValueStr()); // Returns "StringVar value: Just a test";
// The values in the two lines below should match although their specific value is not known beforehand
Console::Write("PointerVar value: "); Console::WriteLine(PointerVar.ValuePtr());
Console::Write("DoubleVar address: "); Console::WriteLine(DoubleVar.ValueAddr());
Console::WriteLine(PointerVar.ValuePtr());

DLL import code

VB
C#
Delphi
C++
VC++.NET


            <DllImport(uCalcDLL, CharSet:=CharSet.Ansi, CallingConvention:=CallingConvention.Cdecl, EntryPoint:="Value")> _

Private Function Value__(ByVal ItemHandle As IntPtr) As  Double
End Function


            [DllImport(uCalcDLL, CharSet=CharSet.Ansi, CallingConvention=CallingConvention.Cdecl, EntryPoint="Value")]

protected static extern  double Value_(IntPtr ItemHandle);


            {DLLImport}function Value__(ItemHandle: System.Pointer):  Double; cdecl; external uCalcDLL name 'Value';


            typedef  double (* __Value)(void *ItemHandle);


            [DllImport(uCalcLib, CharSet=CharSet::Ansi, CallingConvention=CallingConvention::Cdecl, EntryPoint = "Value")]

static double Value_(void *  ItemHandle);