ALP to Search for the occurrence of a character in a given string. Use function calls for reading the character from keyboard and reading a string using buffered keyboard input

 Write an ALP to search for the occurrence of a character in a given string. Use function calls for reading the character from keyboard and reading a string using buffered keyboard input.


.model small
        .data
        str db 80h,?,7dh dup(0)
        search_char db '?'
        len equ search_char-str
        pos dw ?
        msg db 'type in a sentence,cr, then char to be search',0dh,0ah,'$'
        msg1 db 0dh,0ah,'search successful $'
        msg2 db 0dh,0ah,'not successfull $'
        crlf db 0dh,0ah,'$'
        .code
        mov ax,@data
        mov ds,ax
        mov es,ax
        mov ah,9
        lea dx,msg
        int 21h


        mov ah,0ah
        lea dx,str
        int 21h

        lea di,str+2
        mov cx,len-2

        mov ah,9
        lea dx,crlf
        int 21h
        mov ah,1
        int 21h
        mov search_char,al

        repne scasb
        jz get_pos
        mov ah,9
        mov dx,offset msg2
        int 21h
        jmp exit

       get_pos: sub di,offset str+2
       mov pos,di
       mov ah,9
       lea dx,msg1
       int 21h
       call posdisp
       exit : mov ah,4ch
       int 21h

       posdisp proc near
       mov al,byte ptr pos
       and al,0f0h
       mov cl,4
       rol al,cl

       call asc_dsp
       mov al,byte ptr pos
       and al,0fh
       call asc_dsp
       ret

       asc_dsp proc near
       cmp al,0ah
       jb next
       add al,07
       next: add al,'0'
       mov dl,al
       mov ah,2
       int 21h
       ret
       asc_dsp endp
       posdisp endp
       end

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Rishabh Chatterjee

Hi. I’m Engineering Student. I’m YouTuber. I’m Trying to find my passion.Sharing my life experiences with the world.

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