.globl main

.data
strSelOp: .asciiz "Select operation (+, -, *, or /): "
strNum1: .asciiz "\nEnter Number 1: "
strNum2: .asciiz "\nEnter Number 2: "
strResults: .asciiz "\nAnswer = "
strOpAdd: .asciiz "+"
strOpSub: .asciiz "-"
strOpDiv: .asciiz "/"
strOpMul: .asciiz "*"
input: .space 2

.text
main:
	# $s0 = operator
	# $s1 = num1
	# $s2 = num2
	# $s3 = result
	# $s4 = holds comparison strings
	li $v0, 4
	la $a0, strSelOp
	syscall

	li $v0, 8
	la $a0, input
	li $a1, 2
	syscall
	move $s0, $a0

	li $v0, 4
	syscall

	li $v0, 4
	la $a0, strNum1
	syscall

	li $v0, 5
	syscall
	move $s1, $v0


	li $v0, 4
	la $a0, strNum2
	syscall

	li $v0, 5
	syscall
	move $s2, $v0

	la $s0, ($s0)

	la $s4, strOpAdd
	beq $s0, $s4, funAdd
	la $s4, strOpSub
	beq $s0, $s4, funSub
	la $s4, strOpDiv
	beq $s0, $s4, funDiv
	la $s4, strOpMul
	beq $s0, $s4, funMul

	j done


funAdd:
	add $s3, $s2, $s1
	j done

funSub:
	sub $s3, $s2, $s1
	j done

funDiv:
	div $s3, $s2, $s1
	j done

funMul:
	mul $s3, $s2, $s1
	j done

done:
	li $v0, 4
	la $a0, strResults
	syscall

	li $v0, 1
	la $a0, ($s3)
	syscall

	li $v0, 10
	syscall