.data 
    firstNumPrompt: .asciiz "Enter g = "
    secondNumPrompt: .asciiz "Enter h = "
    thirdNumPrompt: .asciiz "Enter i = "
    fourthNumPrompt: .asciiz "Enter j = "
    
    function: .asciiz "leaf_example(int g, int h, int i, int j) returns f \n"
    formula: .asciiz "f = (g + h) - (i + j) \n"
    end: .asciiz "f = "

.text

main:

    # First prompt
    li 	$v0, 4 					# Load immediate syscall value 4
    la 	$a0, firstNumPrompt			# Load address into argument 0 (register $a0)
    syscall      				

        # Read the first
        li	$v0, 5				# system call 5 is for reading an integer
        syscall 				# integer value read is in $v0
        add	$t0, $0, $v0			# copy the first num into $to

    # Print the prompt for second num
    li 	$v0, 4 					# Load immediate syscall value 4
    la 	$a0, secondNumPrompt			# Load address into argument 0 (register $a0)
    syscall      				

        # Read the second and add to total
        li	$v0, 5				# system call 5 is for reading an integer
        syscall 				# integer value read is in $v0
        add	$t0, $t0, $v0			# copy the first num into $to
        
    # Print the prompt for third num
    li 	$v0, 4 					# Load immediate syscall value 4
    la 	$a0, thirdNumPrompt			# Load address into argument 0 (register $a0)
    syscall      				

        # Read the third and subtract from total
        li	$v0, 5				# system call 5 is for reading an integer
        syscall 				# integer value read is in $v0
        sub $t0, $t0, $v0			# copy the first num into $to
        
    # Print the prompt for fourth num
    li 	$v0, 4 					# Load immediate syscall value 4
    la 	$a0, fourthNumPrompt			# Load address into argument 0 (register $a0)
    syscall      				

        # Read the fourth and subtract from total
        li	$v0, 5				# system call 5 is for reading an integer
        syscall 				# integer value read is in $v0
        sub	$t0, $t0, $v0			# copy the first num into $to
        
    # Print function header
    li 	$v0, 4 					# Load immediate syscall value 4
    la 	$a0, function				# Load address into argument 0 (register $a0)
    syscall      				

    # Print formula header
    li 	$v0, 4 					# Load immediate syscall value 4
    la 	$a0, formula				# Load address into argument 0 (register $a0)
    syscall      			
    
    # Print total
    li 	$v0, 4 					# Load immediate syscall value 4
    la 	$a0, end				# Load address into argument 0 (register $a0)
    syscall      			
        
   	# Print the total
   	li  $v0, 1
   	la  $a0, ($t0)
   	syscall    
   	
   	nor