using uCalcSoftware;

var uc = new uCalc();
double[] myHostArray = new double[] { 5, 10, 15, 20 };

// Pin the array
var myHostArrayHandle = System.Runtime.InteropServices.GCHandle.Alloc(myHostArray, System.Runtime.InteropServices.GCHandleType.Pinned);

// Bind the uCalc variable to the pinned memory address
uc.DefineVariable("MyArray[]", myHostArrayHandle.AddrOfPinnedObject());

// The uCalc array values come from the host array
Console.WriteLine(uc.Eval("MyArray[0]"));
Console.WriteLine(uc.Eval("MyArray[1]"));
Console.WriteLine(uc.Eval("MyArray[2]"));
Console.WriteLine(uc.Eval("MyArray[3]"));
Console.WriteLine("");

// Changing the uCalc array updates the pinned array
uc.Eval("MyArray[0] = 10; MyArray[1] = 20; MyArray[2] = 30; MyArray[3] = 40; ");

// The changes the uCalc array are reflected in the host array
Console.WriteLine(myHostArray[0]);
Console.WriteLine(myHostArray[1]);
Console.WriteLine(myHostArray[2]);
Console.WriteLine(myHostArray[3]);
Console.WriteLine("");

// One more round trip
myHostArray[0] = 10;
myHostArray[1] = 11;
myHostArray[2] = 12;
myHostArray[3] = 13;

Console.WriteLine(uc.Eval("MyArray[0]"));
Console.WriteLine(uc.Eval("MyArray[1]"));
Console.WriteLine(uc.Eval("MyArray[2]"));
Console.WriteLine(uc.Eval("MyArray[3]"));

// Don't forget to free the handle when you are completely done with the parser instance
myHostArrayHandle.Free();