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;pbcompilerc -d Unsigned.pb 

CompilerIf #PB_Compiler_Backend = #PB_Backend_C 
!unsigned int v_a =0;  
!unsigned int v_b =0;
CompilerEndIf 

Global a.l, b.l,c.l,d.l 

a = 4294967295 ;a is unsigned 
c = 4294967295 ;c is signed  

b = a / 2

If a > b 
  Debug "a is unsigned"
Else 
  Debug "a is signed"
EndIf   

Debug a 
Debug b 

d = c / 2 

If c > d 
  Debug "c is unsigned"
Else 
  Debug "c is signed"
EndIf   

Debug c 
Debug d