I have a NASM Assembly Language lab that Im working on and I

I have a NASM Assembly Language lab that Im working on, and I really need some help with it. If anyone could help me that would be great!

I have to write an 8086 nasm program which does the following:

1) Sets aside two buffers of 100 bytes each to hold input strings.

2) Write a function INSTRING which accepts the address of a string buffer on the stack, and uses int 21h, function 1 and an appropriate string instruction to read a string from the keyboard and store it in the buffer. The string is to be terminated with an ASCII NULL character (character code 0) as the end-of-string marker

3) Write a function LENGTH which accepts the address of a string buffer on the stack and returns the number of characters (not including the end-of-string character) in ax. You may use either based mode, indexed mode, or string instructions to accomplish this task.

4) Write a function WCOUNT which accepts the address of a string buffer on the stack and returns the number of words in the string in the ax register. A \"word\" will be considered to be a sequence of characters not including an ASCII space character (ASCII code 20h.)

5) Write a function PRINTLN which will accept to address of a string buffer containing a zero-terminated string on the stack and prints all the characters in the string, followed by a carriage return and a linefeed.

6) Write a function NUMOUT which will accept a number on the stack and prints it as a base 10 integer.

All your functions should save and restore all the register used except for those used in returning values. You main program will call these functions, prompting for the input of each string.  Use INSTRING to input two separate strings into your two buffers. It will then use LENGTH, WCOUNT, NUMOUT, and PRINTLN to produce input similar to the following sample output:

Sample output:

Please enter the first string: Able was I ere I saw Elba
Please enter the second string: The amount owed is $100

The first string has a length of 25

The second string has a length of 23
The first string has a word count of 7
The second string has a word count of 5

The first string is: Able was I ere I saw Elba
The second string is: The amount owed is $100

I am stuck on the main fucntion and writing most of the other functions because the user is inputing two strings instead of one.

Solution

DATA SEGMENT
       STR1 DB \"ENTER FIRST STRING HERE ->$\"
       STR2 DB \"ENTER SECOND STRING HERE ->$\"
       STR11 DB \"FIRST STRING : ->$\"
       STR22 DB \"SECOND STRING: ->$\"

       INSTR1 DB 20 DUP(\"$\")
       INSTR2 DB 20 DUP(\"$\")
       NEWLINE DB 10,13,\"$\"
       N DB ?
       S DB ?
       MSG1 DB \"LENGTH OF THE STRING 1 IS :- $\"
       MSG2 DB \"BOTH STRING ARE DIFFERENT$\"

DATA ENDS

CODE SEGMENT

       ASSUME DS:DATA,CS:CODE
START:

       MOV AX,DATA
       MOV DS,AX

       LEA SI,INSTR1
       LEA DI,INSTR2

;GET STRING
       MOV AH,09H
       LEA DX,STR1
       INT 21H

       MOV AH,0AH
       MOV DX,SI
       INT 21H


       MOV AH,09H
       LEA DX,NEWLINE
       INT 21H

       MOV AH,09H
       LEA DX,STR2
       INT 21H

       MOV AH,0AH
       MOV DX,DI
       INT 21H


       MOV AH,09H
       LEA DX,NEWLINE
       INT 21H


;PRINT THE STRING

       MOV AH,09H
       LEA DX,STR11
       INT 21H

       MOV AH,09H
       LEA DX,INSTR1+2
       INT 21H

       MOV AH,09H
       LEA DX,NEWLINE
       INT 21H

       MOV AH,09H
       LEA DX,STR22
       INT 21H

       MOV AH,09H
       LEA DX,INSTR2+2
       INT 21H

       MOV AH,09H
       LEA DX,NEWLINE
       INT 21H
DISPLAY MSG1

MOV AL,LEN1
ADD AL,30H

MOV DL,AL
MOV AH,2
INT 21H

LEA DI,STR2
NEXT2:
CMP [DI],\'$\'
JE DONE2
INC LEN2
INC DI
JMP NEXT2
DONE2:
DISPLAY MSG2

MOV AL,LEN2
ADD AL,30H

MOV DL,AL
MOV AH,2
INT 21H

MOV AL,LEN1
CMP AL,LEN2
JE EQUAL

EXIT:
MOV AH,4CH
INT 21H
CODE ENDS

END START