# IntPtr.Subtraction(IntPtr, Int32) Operador

## Definición

Resta un desplazamiento del valor de un puntero.Subtracts an offset from the value of a pointer.

``````public:
static IntPtr operator -(IntPtr pointer, int offset);``````
``public static IntPtr operator - (IntPtr pointer, int offset);``
``static member ( - ) : nativeint * int -> nativeint``
``Public Shared Operator - (pointer As IntPtr, offset As Integer) As IntPtr``

#### Parámetros

pointer
IntPtr

Puntero del que se va a restar el desplazamiento.The pointer to subtract the offset from.

offset
Int32

Desplazamiento que se va a restar.The offset to subtract.

#### Devoluciones

IntPtr

Nuevo puntero que es el resultado de restar `offset` de `pointer`.A new pointer that reflects the subtraction of `offset` from `pointer`.

## Comentarios

El Subtraction método define la operación de resta de IntPtr objetos.The Subtraction method defines the subtraction operation for IntPtr objects. Permite el código como el siguiente.It enables code such as the following.

``````int[] arr = { 2, 4, 6, 8, 10, 12, 14, 16, 18, 20};
unsafe {
fixed(int* parr = &arr[arr.GetUpperBound(0)])
{
IntPtr ptr = new IntPtr(parr);
for (int ctr = 0; ctr <= arr.GetUpperBound(0); ctr++)
{
IntPtr newPtr = ptr - ctr * sizeof(Int32);
}
}
}
// The example displays the following output:
//       20   18   16   14   12   10   8   6   4   2
``````
``````Dim arr() As Integer = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20 }
Dim ptr As IntPtr = Marshal.UnsafeAddrOfPinnedArrayElement(arr, arr.GetUpperBound(0))
For ctr As Integer= 0 To arr.GetUpperBound(0)
Dim newPtr As IntPtr = ptr - ctr * Len(arr(0))