A minimal example demonstrating the basic 'Parse once, Evaluate many' pattern.

ID: 1192

See: Evaluate, Optimizing Performance in Loops 
				
					using uCalcSoftware;

var uc = new uCalc();
// 1. Parse the expression string once to create a reusable object.
//var expr = uc.Parse("5 * 10");
using (var expr = new uCalc.Expression("5 * 10")) {
   
   // 2. Evaluate the pre-parsed object as many times as needed.
   Console.WriteLine(expr.Evaluate());
   Console.WriteLine(expr.Evaluate());

} // The expression object is automatically released here.
				
			
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   // 1. Parse the expression string once to create a reusable object.
   //var expr = uc.Parse("5 * 10");
   {
      uCalc::Expression expr("5 * 10");
      expr.Owned(); // Causes expr to be released when it goes out of scope

      // 2. Evaluate the pre-parsed object as many times as needed.
      cout << expr.Evaluate() << endl;
      cout << expr.Evaluate() << endl;

   } // The expression object is automatically released here.
}
				
			
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					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      '// 1. Parse the expression string once to create a reusable object.
      '//var expr = uc.Parse("5 * 10");
      Using expr As New uCalc.Expression("5 * 10")
         
         '// 2. Evaluate the pre-parsed object as many times as needed.
         Console.WriteLine(expr.Evaluate())
         Console.WriteLine(expr.Evaluate())
         
      End Using '// The expression object is automatically released here.
   End Sub
End Module
				
			
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