CS 271 Assignement 01

assignment01.asm

TITLE Assignment 01     (assignment01.asm)

; Author: Addison Huddy
; CS271 / Program 01                 Date: Oct 7 2014
; Description: taking in two numbers from the user and calculating
; sum, difference, product, integer quotient, and remainder

INCLUDE Irvine32.inc

; (insert constant definitions here)

.data
welcomeMsg		BYTE		"Welcome to basic math with Addison Huddy",0
instructionsMsg		BYTE		"I will ask for two numbers and make some basic calculations",0
num1Msg			BYTE		"Enter in a number: ",0
num2Msg			BYTE		"Enter another number equal to or less than the first number: ",0
goodbyeMsg		BYTE		"Thanks and goodnight ",0
differenceMsg		BYTE		"The difference is ",0
sumMsg			BYTE		"The sum is ",0
productMsg		BYTE		"The product is ",0
quotientMsg		BYTE		"The quotient is ",0
remainderMsg		BYTE		"The remainder is ",0
quitMsg			BYTE		"Want to do some more math (type 1 to quit, 0 to contine): ",0
preciseMsg		BYTE		"The more precise quotient is ",0
hundred			REAL8		100.0

; section to write data that the program doesn't know yet
.data?
num1			DWORD		? ;first integer to be entered by user
num2			DWORD		? ;first integer to be entered by user
sum			DWORD		? ;sum num1 and num2
difference		DWORD		? ;difference between num1 minus num2
product			DWORD		? ;num1 times num2
quotient		DWORD		? ;num1/num2
remainder		DWORD		? ;the remaining amount of num1
quit			DWORD		? ;if 1 is entered then the program quits

.code
main PROC
	; welcome message
	mov	edx, OFFSET	welcomeMsg
	call	WriteString
	call	CrLf
	mov	edx, OFFSET	instructionsMsg
	call	WriteString
	call	CrLf	
	
	; large loop to allow the user to enter in two more numbers if they choose
	.repeat
		LGetNumbers:
			; get number 1
			mov	edx, OFFSET num1Msg
			call	WriteString
			call	ReadInt
			mov	num1, eax

			; get number 2
			mov	edx, OFFSET num2Msg
			call	WriteString
			call	ReadInt
			mov	num2, eax
		
		; need to compare num1 and num2. Jumps to LGetNumbers if num2 is greater than num1
		mov 	eax, num1
		mov	ebx, num2
		cmp	eax, ebx
		jb LGetNumbers
		
		; calculate sum
		mov	eax, num1
		mov	ebx, num2
		add	eax, ebx
		mov	sum, eax
		
		; calculate difference
		mov	eax, num1
		mov	ebx, num2
		sub	eax, ebx
		mov	difference, eax
		
		; calculate product
		mov	eax, num1
		mov	ebx, num2
		mul	ebx
		mov	product, eax
		
		; calculate quotient
		mov	eax, num1
		cdq 					; changing eax to a qword (8 byte integer)
		mov 	ebx, num2
		div	ebx
		mov	quotient, eax
		mov	remainder, edx	; the remainder is in edx after calling div. Tried is with ebx, and that is just num2 still
		
		; display sum to the user
		mov	edx, OFFSET sumMsg
		call	WriteString
		mov	eax, sum
		call	WriteDec
		call	CrLf
		
		; display difference to the user
		mov	edx, OFFSET differenceMsg
		call	WriteString
		mov	eax, difference
		call	WriteDec
		call	CrLf
		
		; display product to the user
		mov	edx, OFFSET productMsg
		call	WriteString
		mov	eax, product
		call	WriteDec
		call	CrLf
		
		; display quotient and remainder
		mov	edx, OFFSET	quotientMsg
		call	WriteString
		mov	eax, quotient
		call	WriteDec
		call	CrLf
		mov	edx, OFFSET	remainderMsg
		call	WriteString
		mov	eax, remainder
		call	WriteDec
		call	CrLf
		
		; calculate and display complex floating-point quotient. To get the right percision: *100 -> integer -> /100
		mov	edx, OFFSET preciseMsg
		call	WriteString
		fld	num1
		fdiv	num2
		fmul	hundred
		frndint
		fdiv	hundred
		call	WriteFloat
		call	CrLf
		
		; display quit message
		mov	edx, OFFSET quitMsg
		call	WriteString
		call	ReadInt
		mov	quit, eax
		
	.until quit == 1
	
	; say goodbye to the user
	mov	edx, OFFSET goodbyeMsg
	call	WriteString
	call	CrLf
		
	exit	; exit to operating system
main ENDP

; (insert additional procedures here)

END main