Concat Strings

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Jakevfr

Joined: 03 Feb 2007
Posts: 26

Jakevfr 15 May 2007, 20:32

How can I concat (add) two strings together in DOS? I'm wanting to have the user input their first name, then their last name, and then add them together for their full name.

Thanks

15 May 2007, 20:32

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4624
Location: Argentina

LocoDelAssembly 15 May 2007, 21:24

Supposing NULL terminated strings and flat mode to simplify things:

Code:

strCat: ; SI = destination; DI = source; DF = 0
  lodsb
  test al, al
  jnz strCat

  xchg si, di
  dec di

.copyChar:
  lodsb
  stosb
  test al, al
  jnz .copyChar

  ret

15 May 2007, 21:24

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 16 May 2007, 00:08

don't forget to add space between them Wink

16 May 2007, 00:08

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4624
Location: Argentina

LocoDelAssembly 16 May 2007, 01:01

Code:

mov byte[buffer], 0

irp source, szFirstName, szSpace, szLastName
{
  mov si, buffer
  mov di, source
  call strCat
}

16 May 2007, 01:01

Jakevfr

Joined: 03 Feb 2007
Posts: 26

Jakevfr 16 May 2007, 20:37

Thanks!

16 May 2007, 20:37

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