Question

write a MIPS code in qtspim to calculate the factorial of the user's input number, so if the user inputs 3, the output should be 6.

Answer 1

To calculate the factorial of a number in MIPS assembly language, you need to use a loop.

Step-by-step explanation:

To calculate the factorial of a number in MIPS assembly language, you need to use a loop. Here is an example of a MIPS code in QTSpim to calculate the factorial of a user's input number:

.data
prompt: .asciiz "Enter a number: "
result: .asciiz "The factorial is: "

.text
.globl main

main:
li $v0, 4
la $a0, prompt
syscall

li $v0, 5
syscall
move $t0, $v0

li $t1, 1
li $t2, 1

loop:
mul $t1, $t1, $t2
addi $t2, $t2, 1
bne $t0, $t2, loop

li $v0, 4
la $a0, result
syscall

move $a0, $t1
li $v0, 1
syscall

li $v0, 10
syscall