Internal Test: Validates that end-users cannot modify a locked constant.

ID: 288

See: DefineConstant 
				
					using uCalcSoftware;

var uc = new uCalc();
uc.DefineConstant("LOCKED_VAL = 1000");
Console.WriteLine($"Initial value: {uc.Eval("LOCKED_VAL")}");

// 1. End-user attempts to assign a value. This should fail.
uc.Eval("LOCKED_VAL = 2000");
Console.WriteLine($"Error after assignment attempt: {uc.Error.Message}");
Console.WriteLine($"Value remains unchanged: {uc.Eval("LOCKED_VAL")}");

				
			
Initial value: 1000
Error after assignment attempt: Value cannot be assigned here
Value remains unchanged: 1000
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   uc.DefineConstant("LOCKED_VAL = 1000");
   cout << "Initial value: " << uc.Eval("LOCKED_VAL") << endl;

   // 1. End-user attempts to assign a value. This should fail.
   uc.Eval("LOCKED_VAL = 2000");
   cout << "Error after assignment attempt: " << uc.Error().Message() << endl;
   cout << "Value remains unchanged: " << uc.Eval("LOCKED_VAL") << endl;

}
				
			
Initial value: 1000
Error after assignment attempt: Value cannot be assigned here
Value remains unchanged: 1000
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					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      uc.DefineConstant("LOCKED_VAL = 1000")
      Console.WriteLine($"Initial value: {uc.Eval("LOCKED_VAL")}")
      
      '// 1. End-user attempts to assign a value. This should fail.
      uc.Eval("LOCKED_VAL = 2000")
      Console.WriteLine($"Error after assignment attempt: {uc.Error.Message}")
      Console.WriteLine($"Value remains unchanged: {uc.Eval("LOCKED_VAL")}")
      
   End Sub
End Module
				
			
Initial value: 1000
Error after assignment attempt: Value cannot be assigned here
Value remains unchanged: 1000
Explore 600+ other examples