Assignment: Calculator Description: addition (+), subtraction (-), multiplicatio

Question

Assignment: Calculator Description: addition (+), subtraction (-), multiplication (*), integer division (/), modulo division (%), and Write a calculator program in assembly. It should handle the following functions exponentiation (). Your program should.. 1. Read an integer from the user. 2. Read a character from the user, representing the function. (+,-, *, /, %, ^) 3. Read another integer from the user 4. Print an equals sign 5. Print the result. Please comment your code, and format it so that it looks clean! (examples on next page)

Explanation / Answer

.data

line    byte "Welcome to simple calculator in Assembly",0,13h,10h
line1    byte "Choose any one operation : '+' '-' '/' '*' '%' ",0,13h,10h

message1 byte "Enter first Integer: ",0,13h,10h
message2 byte "Enter second integer: ",0,13h,10h

put1 byte "Result is equal to =",0
put2 byte "First no: ",0
put3 byte "Second no: ",0

num1 word?
num2 word?

button byte?

.code
main PROC
call clrscr
mov edx,offset line
call write string
call calf

start:
mov edx,offset msg1 ;Read 1st num
call writestring
call readint
mov num1,ax

call crlf
mov edx,offset line1
call writestring

mov edx,offset button
call readchar
mov button,al

mov edx,offset msg2 ;Read 2nd num
call writestring
call readint
mov num2,ax

cmp button,'+'
JE addition

cmp button,'-'
JE subtraction

cmp button,'*'
JE multiplication

cmp button,'/'
JE division

cmp button,'%'
JE modulus

addition:
mov edx,offset put2 ;display both numbers
call writestring
mov ax,num1
call writeint
call crlf
mov edx,offset put3
call writestring
mov ax,num2
call writeint
call crlf
call crlf
mov edx,offset put1
call writestring
mov ax,num1
add ax,num2
call writeint
call crlf

JMP start

subtraction:
mov edx,offset put2 ;display both numbers
call writestring
mov ax,num1
call writeint
call crlf
mov edx,offset put3
call writestring
mov ax,num2
call writeint
call crlf
call crlf
mov edx,offset put1
call writestring
mov ax,num2
sub ax,num1
call writeint
call crlf

JMP start

multiplication:
mov edx,offset put2 ;display both numbers
call writestring
mov ax,num1
call writeint
call crlf
mov edx,offset put3
call writestring
mov ax,num2
call writeint
call crlf
call crlf
mov edx,offset put1
call writestring
mov ax,num1
mov bx,num2
mul bx
call writeint
call crlf

JMP start

division:
mov edx,offset put2 ;display both numbers
call writestring
mov ax,num1
call writeint
call crlf
mov edx,offset put3
call writestring
mov ax,num2
call writeint
call crlf
call crlf
mov edx,offset put1
call writestring
mov ax,num1
mov bx,num2
mov dx,0
div bx
call writeint
call crlf

JMP start

modulus:
mov edx,offset put2 ;display both numbers
call writestring
mov ax,num1
call writeint
call crlf
mov edx,offset put3
call writestring
mov ax,num2
call writeint
call crlf
call crlf
mov edx,offset put1
call writestring
mov ax,num1
mov bx,num2
mov dx,0
div dx
mov remainder, dx
call writeint
call crlf

JMP start

stop:
exit main end
end main

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