Pointers and type casting

[Zlatko Vid]

Hi Charles ..All 

is this only way to cast float variable in o2 ?
using in this case dereferece * ...

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float n
'INT i at strptr s  ' integer pointer cast string s
n = 3.14
sys *p = @n
float f2 = (float)p

print f2
I am looking in all examples ...functionPointers 1 and 2
and not understand it well
like in old EBasic where is used :

print *<float>p

is that syntax even possible in o2
if you ask me i am fine with (float)

but above looking more fancy ...?

[Charles Pegge]

Hi Aurel,

This shows the o2 syntax alternatives for casting pointers:

Code Select Expand

'casting pointers
=================
float n = 3.14
sys p = @n
float f2
f2 = (float*) p
print str(f2,2)
print str((float*)p,2)
print str(cast(float*)p,2)
print str(cast float*p,2)


[Zlatko Vid]

Thanks Charles

but why this one work

sys *p = @n

i just tried ..i don't know that work or
simply i expected that not work ...
because of dereferencing  symbol *

of course this looks better:
f2 = (float*) p

[Charles Pegge]

sys *p=@n  won't work on the current system. Too much referencing! Just use plain p as  a variable that contains the address of n