3. Program to Simple Addition (1) in Assembly Language using Visual Studio

on

Chapter 5

Procedures

Assembly Language Programming Exercise

Problem # 3:

Write a program that clears the screen, locates the cursor near the middle of the screen, prompts the user for two integers, adds the integers, and displays their sum.

Solution:


INCLUDE Irvine32.inc

 .data
prompt BYTE "Enter a 32-bit signed integer:",0
resultMsg BYTE "Sum of 2 integers is:",0
int1 DWORD ?
int2 DWORD ?
sum DWORD ?

 .code
main PROC
    call Clrscr

     ;Move cursor to mid screen
    MOV DH, 13    ;y-coordinate range 0-24
    MOV DL, 40    ;x-coordinate range 0-79
    CALL GoToXY    ;locate cursor

     MOV EDX, OFFSET prompt    ;Display prompt
    CALL WriteString
    CALL ReadInt    ;Read integer
    MOV int1,EAX

     CALL WriteString
    CALL ReadInt    ;Read integer
    MOV int2,EAX

     ;calculate sum
    MOV EAX, int1
    ADD EAX, int2
    MOV sum, EAX

     ;display sum
    MOV EDX, OFFSET resultMsg
    call WriteString
    MOV EAX, sum
    call WriteInt

     call Crlf
    call WaitMsg
    exit
main ENDP

 END main