ASM: Convert int to string in Assembly

This post shows how to convert int (DWORD) to string using MASM library dwtoa. There seems to be a bug in dwtoa as it can only handle 2147483647 instead of 4294967295 which is the maximum size of DWORD (32-bit). The code for dwtoa checks for a negative number which is not needed for DWORD. Note that DWORD is defined as 32-bit unsigned.



Pre-requisite:

• Install MASM

To assemble:

\masm32\bin\ml /c /Zd /coff int2string.asm

To link:

\masm32\bin\Link /SUBSYSTEM:CONSOLE int2string.obj