Question

Read a string from user until the user presses enter. Store the string in memory. Read another single character input from user and display the number of occurrences of this character in the string.

by assembly language

Answer 1

ans for the given problem

PROGRAM:

TXT1 DB 10,13,'ENTER ANY STRING :- $'

TXT2 DB 10,13,'ENTER ANY CHARACTER :- $'

TXT3 DB 10,13,' $'

TXT4 DB 10,13,'NO, CHARACTER FOUND IN THE GIVEN STRING $'

TXT5 DB ' CHARACTER(S) FOUND IN THE GIVEN STRING $'

CHAR DB ?

COUNT DB 0

P1 LABEL BYTE

M1 DB 0FFH

L1 DB ?

P11 DB 0FFH DUP ('$')

DATA ENDS

DISPLAY MACRO MSG

MOV AH,9

LEA DX,MSG

INT 21H

ENDM

CODE SEGMENT

ASSUME CS:CODE,DS:DATA

START:

MOV AX,DATA

MOV DS,AX

DISPLAY TXT1

LEA DX,P1

MOV AH,0AH

INT 21H

DISPLAY TXT2

MOV AH,1

INT 21H

MOV CHAR,AL

DISPLAY TXT3

LEA SI,P11

MOV CL,L1

MOV CH,0

CHECK:

MOV AL,[SI]

CMP CHAR,AL

JNE SKIP

INC COUNT

SKIP:

INC SI

LOOP CHECK

CMP COUNT,0

JE NOTFOUND

DISPLAY TXT3

MOV DL,COUNT

ADD DL,30H

MOV AH,2

INT 21H

DISPLAY TXT5

JMP EXIT

NOTFOUND:

DISPLAY TXT4

EXIT: MOV AH,4CH

INT 21H

CODE ENDS

END START

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