# Assembly starter file for Exercise 1

.data 
  width:	.word 
  height:	.word 
  area:		.word 
  perimeter:	.word 
  
  widthPrompt:	.asciiz "Enter width (integer):\n"
  heightPrompt:	.asciiz "Enter height (integer):\n"
  areaIs:	.asciiz "Rectangle's area is "
  perimeterIs: 	.asciiz "Rectange's perimeter is "
  newline:	.asciiz "\n"
  


.text 

main:
				# Print the prompt for width
  addi 	$v0, $0, 4  			# system call 4 is for printing a string
  la 	$a0, widthPrompt 		# address of widthPrompt is in $a0
  syscall           			# print the string

				# Read the width
  addi	$v0, $0, 5			# system call 5 is for reading an integer
  syscall 				# integer value read is in $v0
  add	$8, $0, $v0			# copy the width into $8

				# Print the prompt for height
  addi 	$v0, $0, 4  			# system call 4 is for printing a string
  la 	$a0, heightPrompt 		# address of heightPrompt is in $a0
  syscall           			# print the string
  
				# Read the height
  addi	$v0, $0, 5			# system call 5 is for reading an integer
  syscall 				# integer value read is in $v0
  add	$9, $0, $v0			# copy the height into $9
  
				# Calculate area
  mult	$8, $9				# multiply width * height
  mflo	$10				# bring the product into $10 (assume hi not needed)

				# Calculate perimeter
  add  $11, $8, $9			# Add length + width
  add  $11, $11, $9 			# Add another width
  add  $11, $11, $8 			# Add another length
  
				# Print "Rectangle's area is "
  addi 	$v0, $0, 4  			# system call 4 is for printing a string
  la 	$a0, areaIs 			# address of areaIs string is in $a0
  syscall           			# print the string

				# Print the calculated area (in $10)
  addi 	$v0, $0, 1  			# system call 1 is for printing an integer
  add 	$a0, $0, $10 			# bring the area value from $10 into $a0
  syscall           			# print the integer
  
  				# Print a newline
  addi 	$v0, $0, 4  			# system call 4 is for printing a string
  la 	$a0, newline 			# address of areaIs string is in $a0
  syscall           			# print the string
  
  				# Print "Rectangle's perimeter is "
  addi  $v0, $0, 4 			# System call 4 to print a string
  la 	$a0, perimeterIs		# address of perimeterIs string is in $a0
  syscall				# print the string
  
  				# Print the calculated perimeter (in $11)
  addi  $v0, $0, 1  			# system call 1 is for printing an integer
  add 	$a0, $0, $11			# bring the area value from $11 into $a0
  syscall				# print the integer
  
				# Exit from the program
exit:
  ori $v0, $0, 10       		# system call code 10 for exit
  syscall               		# exit the program