# Implements nCr function

.data
intro: .asciiz "We will calculate the combination formula nCr = n! / ((n-r)! * r! \n"
req_n: .asciiz "Please enter the number of items in a set 'n': "
req_r: .asciiz "Now enter the size of each combinatoric subset 'r': "
error: .asciiz "\nError: Your value of 'n' must be greater than 'r', please retry\n"
success: .asciiz "Debug Complete"

.text
la $a0, intro
li $v0, 4
syscall

input:
la $a0, req_n
li $v0, 4
syscall
li $v0, 5
syscall
move $s0, $v0

la $a0, req_r
li $v0, 4
syscall
li $v0, 5
syscall
move $s1, $v0

ble $s0, $s1, exception

la $a0, success
li $v0, 4
syscall
li $v0, 10
syscall

exception:
la $a0, error
li $v0, 4
syscall
j input