Question

1-) Please submit the solution of your final as Ms-word or PDF document

2-) Complete THREE QUESTIONS out of the four exam questions below.

3-) FOR EACH QUESTION, IT IS REQUIRED to include Ms-Word or Pdf file contains the following

A. Source file and sample of your output screen shots.

B. Up to one page of your program discussion. In the discussion, state the issues that you may have problem with if there is any. Why your program is not running (if it is not)? What was your approach (Your process to the solution)? How did you overcome the issues while writing the program?

C. Write your conclusion as what you have learned from this program.

Not including this report will result of losing 30% because I would not know if you really the one who did it or not.

YOUR REPORT WILL VERIFY THE UNDERSTANDING OF YOUR WORK, AND THAT YOU REALLY DID IT.

Question One: Write an assembly language program that allows a user to enter any 5 numbers then display the sum of the entered 5 numbers.

For example:

Enter: 1, 2, 3, 4, 5

Output First Line: Display: Sum of the Entered is: 15

Output Second Line: Display: Division of entered digit number 4 by entered digit number two 2 so (4/( 2 = 2)

Question Two: Write an assembly language program that allows a user to enter any 6 numbers in any order then display the largest and smallest entered number and the order from small to large and then large to small

For example

Enter: 4, , 2, 7, 9, 6, 1

Display:

Largest entered number is: 9

Smallest entered number is: 1

Large to Small: 9, 7, 6, 4, 2, 1

Small to Large: 1, 2, 4, 6, 7, 9

Question Three: Write an assembly language program to count number of vowels in any given string.

Question Four: Write a procedure named Get_frequencies that constructs a character frequency table. Input to the procedure should be a pointer to a string, and a pointer to an array of 256 doublewords. Each array position is indexed by its corresponding ASCII code. When the procedure returns, each entry in the array contains a count of how many times that character occurred in the string. Include the source code only.

Answer 1

The assembly code for A is as follows:

assume cs:code, ds:data

data segment
     msg1 db "Enter 5 numbers:$"
     msg3 db 10,13,"$" ; msg to display newline
     msg2 db 10,13,"The sum of the entered numbers is:$"
     msg4 db 10,13,"Division of entered number 4 by entered number 2 is:$"
     sum db 0
     digit2 db ?
     digit4 db ?
data ends

code segment
start:
; set segment registers:
    mov ax, data
    mov ds, ax ; initialize the data segment
    lea dx, msg1
    mov ah, 09
    int 21h ; display msg1 using the above code
    lea dx, msg3
    mov ah, 09
    int 21h; display msg3      
    mov cx,05 ; initialize cx with count of numbers to be read
up:
    mov ah,01h
    int 21h ; read a number
    sub al,30h ; the ascii value of number is read
    ; for eg, if 1 is read, 31h will be available in al
    ;subtract 30h from it to obtain the rquired number
    add sum,al ; add the entered value with variable sum
    cmp cx,04h
    jne digitf
    mov digit2,al
digitf:
    cmp cx,02h
    jne next
    mov digit4,al
next:  
    mov ah,09h
    lea dx,msg3
    int 21h ; display msg3
    loop up ; loop continues for no.of time mentioned in cx
    lea dx,msg2
    mov ah, 09h
    int 21h    ; display msg2
    mov al,sum ; put the final sum in al
    aam ; apply aam to convert the packed bcd sum to unpacked bcd digits
    ;aam separates the digits and stores it in al and ah
    add ah,30H ; to display any value on screen, the ascii value has to be generated.
    ;Hence add 30h to the value
    add al,30H
    mov dh,al
    mov dl,ah
    mov ah,02h
    int 21h; display the digit1 of sum
    mov dl,dh
    mov ah,02h
    int 21h;display digit2 of sum
    lea dx,msg4
    mov ah,09h
    int 21h ; display msg4
    mov ah,00 ;division is to be performed for ax/bl
    mov al,digit4 ; store digit4 in ax
    mov bl,digit2 ; store digit2 in bl
    div bl ; perform division. quotient will be in AL register
    mov dl,al
    add dl,30h; add 30h to result to get the ascii value of result
    mov ah,02h
    int 21h ; display the result
    mov ah, 4ch ; exit to operating system.
    int 21h  
code ends

end start

OUTPUT: