; Example assembly language program -- adds two numbers
; Author: R. Detmer
; Date: revised 7/97
.386
.MODEL FLAT
ExitProcess PROTO NEAR32 stdcall, dwExitCode:DWORD
INCLUDE io.h ; header file for input/output
cr EQU 0dh ; carriage return character
Lf EQU 0ah ; line feed
.STACK 4096 ; reserve 4096-byte stack
.DATA ; reserve storage for data
number1 DWORD ?
number2 DWORD ?
prompt1 BYTE "Enter first number: ", 0
prompt2 BYTE "Enter second number: ", 0
string BYTE 40 DUP (?)
label1 BYTE cr, Lf, "The sum is "
sum BYTE 11 DUP (?)
BYTE cr, Lf, 0
.CODE ; start of main program code
_start:
output prompt1 ; prompt for first number
input string, 40 ; read ASCII characters
atod string ; convert to integer
mov number1, eax ; store in memory
output prompt2 ; repeat for second number
input string, 40
atod string
mov number2, eax
mov eax, number1 ; first number to EAX
add eax, number2 ; add second number
dtoa sum, eax ; convert to ASCII characters
output label1 ; output label and sum
INVOKE ExitProcess, 0 ; exit with return code 0
PUBLIC _start ; make entry point public
END ; end of source code