Write an assembly program to CHECK NUMBER OF VOWELS

Write an assembly program to CHECK NUMBER OF VOWELS

Write an assembly program to CHECK NUMBER OF VOWELS
title check number of vowels
dosseg
.model small
.stack 100H
.code
main proc
mov ax, @data ; initialize ds register
mov ds, ax
mov si, offset string
mov cx, length ; length in cx register
mov bl, 00 ; vowel = 0
BACK: mov al, [si] cmp al, ‘a’ ; alternatively cmp al, 41h for comparing if al =41h
jb AHEAD ; jump below if al < 41, discard
cmp al, ‘z’ ; convert the character to upper case
ja VOWEL
sub al, 20h
VOWEL: cmp al, ‘A’
jnz a3 ; go to a3 to check next vowel character
inc bl ; vowel = vowel + 1
jmp a2 ; jump to increment pointer
a3: cmp al, ‘E’
jnz a4 ; go to a4 to check next vowel character
inc bl ; vowel = vowel + 1
jmp a2 ; jump to increment pointer
a4: cmp al, ‘I’
jnz a5 ; go to a5 to check next vowel character
inc bl ; vowel = vowel + 1
jmp a2 ; jump to increment pointer
a5: cmp al, ‘O’
jnz a6 ; go to a6 to check next vowel character
inc bl ; vowel = vowel + 1
jmp a2 ; jump to increment pointer
a6: cmp al, ‘U’
jmp a2 ; jump to increment pointer
inc bl ; vowel = vowel + 1
a2: inc si
loop BACK
mov VOWEL, bl
mov ax, 4C00H ; return to DOS
int 21H
main endp
.data
string db ‘The quick brown fox jumped over the lazy sleeping dog’, ‘$’
length dw $ string
VOWEL db ?
end main
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