On Wednesday, September 22, 2004, at 10:13 PM, Ken Shmidheiser wrote: > I am working to increase my understanding of pointers. In this code I > am trying to use a pointer to obtain the value of any element in an > array. I think what I'm seeing here is the element's address in > memory, but I don't understand how to dereference the pointer to > return the value of the array element itself. > > My confession for tonight: I've been ignorant of pointers too long and > am aspiring to the heights of Jay. While I understand the car > keys-parking lot illustration of pointing to memory, what I need is > some practical help in using pointers in FB4 with some simple examples > in code. > > Believe it or not, I have had more success in understanding pointers > in C, because the simple * syntax is used consistently for > dereferencing unlike FB. > > Any pointers? > > (Sorry, couldn't resist.) > > Ken You can just use a pointer var, don't need a pointer to array pointer, whatevers. This returns an unsigned int however using the assembly quickie...but Peek Word works nice enough. Note: Window is 800 wide to show all 4 across... r c _arrayElements = 6 dim as int myArr( _arrayElements ),var myArr(0) = _arrayElements myArr(1) = 1 myArr(2) = 23 myArr(3) = 17 myArr(4) = 4 myArr(5) = -5 myArr(6) = 100 local fn PickinNPointin dim as int i dim as ptr myPtr myPtr = @myArr(0) // myPtr points to memory at element 0 for i = 1 to myArr(0) myPtr += 2 // now points at index 1, then the next... print "Via loop: myArr("; i; " ) ="; myArr(i), print "Via pointer: arrayPrt + 1 ="; myPtr.0%`, // unsigned int will be displayed... var = myPtr.0%` // easier way to do this no doubt. print "Signed from pointer...";var, print "Via Peek word:";Peek Word (myPtr) next i end fn window 1,"Results",(0,0)-(800,120),_docNoGrow fn PickinNPointin include "Subs Quick Event Loop.Incl"