have this code but it needs to work in lc3 stimulate by, it only allows user to type characters and does not prompt user with instructions etc. Prompt the user with instructions Allow user to type characters They will be uppercase, lowercase, numbers, spaces, and punctuation Show the user each character they typed as they type them When the user types numeric zero (0), stop accepting character Report to user how many lowercase 'a's were entered to the user Automatically start over .ORIG x3000 AND R1,R1,#0 ; R1=0 (counter) LD R3, ASCIIA ; R3=#97 NOT R3,R3 ADD R3,R3,#1 ; R3=#-97 LD R4, ASCII0 ; R4=#48 NOT R4,R4 ADD R4,R4,#1 ; R4=#-48 loop GETC ; Read a characters from keyboard. OUT ; print the character entered ADD R2,R0,R4 ; check whether character is 0 BRZ done ; if character is 0, exit the loop ADD R2,R0,R3 ; otherwise, check whether the character is 'a' BRZ count ; if character is 'a', go to label Count BR loop ; otherwise, repeat the loop count ADD R1,R1,#1 ; increment the counter by 1 BR loop ; repeat the loop done LD R0,ASCNEL ; R0=#10 OUT ; print new line LD R4, ASCII0 ; R4=#48 AND R0,R0,#0 ; R0=#0 ADD R0,R4,R1 ; R0=R4+R1 (convert the counter to ascii digit) OUT ; print the counter(as ascii digit) HALT ASCII0 .FILL x0030 ;#48 ASCII of '0' ASCIIA .FILL x0061 ;#97 ASCII of 'a' ASCNEL .FILL x000A ;#10 ASCII of '\n' .END

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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I have this code but it needs to work in lc3 stimulate by, it only allows user to type characters and does not prompt user with instructions etc.

Prompt the user with instructions
Allow user to type characters
- They will be uppercase, lowercase, numbers, spaces, and punctuation
Show the user each character they typed as they type them
When the user types numeric zero (0), stop accepting character
Report to user how many lowercase 'a's were entered to the user
Automatically start over

.ORIG x3000

AND R1,R1,#0 ; R1=0 (counter)

LD R3, ASCIIA ; R3=#97

NOT R3,R3

ADD R3,R3,#1 ; R3=#-97

LD R4, ASCII0 ; R4=#48

NOT R4,R4

ADD R4,R4,#1 ; R4=#-48

loop GETC ; Read a characters from keyboard.

OUT ; print the character entered

ADD R2,R0,R4 ; check whether character is 0

BRZ done ; if character is 0, exit the loop

ADD R2,R0,R3 ; otherwise, check whether the character is 'a'

BRZ count ; if character is 'a', go to label Count

BR loop ; otherwise, repeat the loop

count

ADD R1,R1,#1 ; increment the counter by 1

BR loop ; repeat the loop

done LD R0,ASCNEL ; R0=#10

OUT ; print new line

LD R4, ASCII0 ; R4=#48

AND R0,R0,#0 ; R0=#0

ADD R0,R4,R1 ; R0=R4+R1 (convert the counter to ascii digit)

OUT ; print the counter(as ascii digit)

HALT

ASCII0 .FILL x0030 ;#48 ASCII of '0'

ASCIIA .FILL x0061 ;#97 ASCII of 'a'

ASCNEL .FILL x000A ;#10 ASCII of '\n'

.END

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