Illustrates the core relationship between the uCalc engine, an Item (variable), and a compiled Expression.
ID: 31
See: Evaluate, Introduction, Memory Management, Parse, Release, Release, The uCalc Object Model - A High-Level Overview, uCalc Fast Math Parser, Value(double)
using uCalcSoftware;
var uc = new uCalc();
var VariableX = uc.DefineVariable("x");
var Expression = "x^2 * 10"; // Replace this with your expression
Console.WriteLine("--- Efficient: Parse() once, then Evaluate() in a loop ---");
var ParsedExpr = uc.Parse(Expression);
for (double x = 1; x <= 10; x++) {
VariableX.Value(x);
Console.WriteLine(ParsedExpr.Evaluate());
}
ParsedExpr.Release();
VariableX.Release();
--- Efficient: Parse() once, then Evaluate() in a loop ---
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#include <iostream>
#include "uCalc.h"
using namespace std;
using namespace uCalcSoftware;
int main() {
uCalc uc;
auto VariableX = uc.DefineVariable("x");
auto Expression = "x^2 * 10"; // Replace this with your expression
cout << "--- Efficient: Parse() once, then Evaluate() in a loop ---" << endl;
auto ParsedExpr = uc.Parse(Expression);
for (double x = 1; x <= 10; x++) {
VariableX.Value(x);
cout << ParsedExpr.Evaluate() << endl;
}
ParsedExpr.Release();
VariableX.Release();
}
--- Efficient: Parse() once, then Evaluate() in a loop ---
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Imports System
Imports uCalcSoftware
Public Module Program
Public Sub Main()
Dim uc As New uCalc()
Dim VariableX = uc.DefineVariable("x")
Dim Expression = "x^2 * 10" '// Replace this with your expression
Console.WriteLine("--- Efficient: Parse() once, then Evaluate() in a loop ---")
Dim ParsedExpr = uc.Parse(Expression)
For x As Double = 1 To 10
VariableX.Value(x)
Console.WriteLine(ParsedExpr.Evaluate())
Next
ParsedExpr.Release()
VariableX.Release()
End Sub
End Module
--- Efficient: Parse() once, then Evaluate() in a loop ---
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