TYPEDEF Operator

The operator lets you create a user-defined type that has all the status of a built-in type when defining variables. It is ideal for creating pointer variables.


PWORD TYPEDEF PTR WORD PWORD TYPEDEF PTR DWORD 
 
 INCLUDE Irvine32.inc
  PWORD  TYPEDEF  PTR  WORD
 .data
  array    WORD   10h, 20h, 30h, 40h
  pointer  PWORD  array
 .code
 main PROC
     mov   ecx, LENGTHOF array
     mov   eax, 0
     mov   esi, pointer
 L1: add   ax, [esi]
     add   esi, 2
     loop  L1
     call  WriteHex
     exit
 main ENDP
 END main


 INCLUDE Irvine32.inc
  PDWORD  TYPEDEF  PTR  DWORD
 .data
  array    WORD    10h, 20h, 30h, 40h
  pointer  PDWORD  array
 .code
 main PROC
     mov   ecx, 2
     mov   eax, 0
     mov   esi, pointer
 L1: add   eax, [esi]
     add   esi, 4
     loop  L1
     call  WriteHex
     exit
 main ENDP
 END main
Output Output

 

 

 

 

The following list gives the differences between and :





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