Ptr
A variable declaration type modifier
Declares a pointer variable. The same as Pointer.
Operator @ (Address Of) operator or VarPtr are used to take the address of a variable. The Operator * (Value Of) operator is used to dereference the pointer, that is, access the actual value stored in the memory location the pointer is pointing at.
Syntax
Description
Declares a pointer variable. The same as Pointer.
Operator @ (Address Of) operator or VarPtr are used to take the address of a variable. The Operator * (Value Of) operator is used to dereference the pointer, that is, access the actual value stored in the memory location the pointer is pointing at.
Example
' Create the pointer.
Dim p As Integer Ptr
' Create an integer value that we will point to using pointer "p"
Dim num As Integer = 98845
' Point p towards the memory address that variable "num" occupies.
p = @num
' Print the value stored in memory pointed to by pointer "p"
Print "Pointer 'p' ="; *p
Print
' Print the actual location in memory that pointer "p" points at.
Print "Pointer 'p' points to memory location:"
Print p
Dim p As Integer Ptr
' Create an integer value that we will point to using pointer "p"
Dim num As Integer = 98845
' Point p towards the memory address that variable "num" occupies.
p = @num
' Print the value stored in memory pointed to by pointer "p"
Print "Pointer 'p' ="; *p
' Print the actual location in memory that pointer "p" points at.
Print "Pointer 'p' points to memory location:"
Print p
Dialect Differences
- Not available in the -lang qb dialect unless referenced with the alias __Ptr.
Differences from QB
- New to FreeBASIC
See also