p2p.wrox.com Forums

p2p.wrox.com Forums (http://p2p.wrox.com/index.php)
-   Forum and Wrox.com Feedback (http://p2p.wrox.com/forumdisplay.php?f=56)
-   -   Help Please (http://p2p.wrox.com/showthread.php?t=8958)

GTguy February 4th, 2004 12:34 PM

Help Please
Hello Everybody

This is my first time writing on here so I will do my best to describe my two problems.

A) I have to make up a program that would change a hexadecimal number of length 4 (e.g. A10F) and change it into decimal form (e.g. 41231)

B) Using the addigits.asm file i have to change to read the string even if other characters are put in by the user (e.g. r6lk72É? would be equal to 15)

I have included the addigits.asm file below. If you could help or give me any clue on how to solve these i would really appreciate it.

TITLE Add individual digits of a number ADDIGITS.ASM
        Objective: To find the sum of individual digits of
                   a given number. Shows character to binary
                   conversion of digits.
            Input: Requests a number from keyboard.
| Output: Prints the sum of the individual digits.
number_prompt DB 'Please type a number (<11 digits): ',0
out_msg DB 'The sum of individual digits is: ',0
number DB 11 DUP (?)

INCLUDE io.mac
main PROC
        PutStr number_prompt ; request an input number
        GetStr number,11 ; read input number as a string
        mov BX,OFFSET number ; BX := address of number
        sub DX,DX ; DX := 0 -- DL keeps the sum
        mov AL,[BX] ; move the digit to AL
        cmp AL,0 ; if it is the NULL character
        je done ; sum is done
        and AL,0FH ; mask off the upper 4 bits
        add DL,AL ; add the digit to sum
        inc BX ; increment BX to point to next digit
        jmp repeat_add ; and jump back
        PutStr out_msg
        PutInt DX ; write sum
main ENDP
        END main

chrislepingwell February 4th, 2004 12:54 PM

Ask this in a forum where they deal with assembly language, and then tell them what version you're using, too :)

There are two secrets to success in this world:
1. Never tell everything you know

GTguy February 4th, 2004 01:08 PM

Where are the assembly language forums then??

chrislepingwell February 4th, 2004 01:12 PM

All I can tell you is that Wrox doesn't have any. Try using google with some assembler code (and the chip you're coding against) as the search term; that should get you moving in the right direction.

There are two secrets to success in this world:
1. Never tell everything you know

All times are GMT -4. The time now is 10:42 PM.

Powered by vBulletin®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
© 2013 John Wiley & Sons, Inc.