$2.$c$)$ Implement a version of your program that allows: $($i$)$ the user to enter a value for

the variable n ; and $($ii$)$ prints the value of fib$(n)$ in the terminal.

$2$c only please, this is the code I already have. Please build upon this:

main:

li $a$0,3$ # Initialize n to $3$

jal fib # Call fib$($n$)$

move $a$0,$ $v$0$ # Move result to $a$0$ for printing

# Exit program

li $v$0,10$

syscall

fib:

addi $sp$,$ $sp$,-8$ # Allocate stack space

sw $ra$,4($$sp$)$ # Save return address

sw $a$0,0($$sp$)$ # Save argument n

li $v$0,0$ # Default return value $0$

beq $a$0,$ $zero, end # if $($n $==0)$ return $0$

li $v$0,1$ # Default return value $1$

li $t$0,1$

beq $a$0,$ $t$0,$ end # if $($n $==1)$ return $1$

# Calculate fib$($n$-1)$

addi $a$0,$ $a$0,-1$

jal fib

move $t$1,$ $v$0$ # Save fib$($n$-1)$ in $t$1$

# Calculate fib$($n$-2)$

lw $a$0,0($$sp$)$

addi $a$0,$ $a$0,-2$

jal fib

add $v$0,$ $v$0,$ $t$1$ # fib$($n$)=$ fib$($n$-1)+$ fib$($n$-2)$

end:

lw $a$0,0($$sp$)$ # Restore argument n

lw $ra$,4($$sp$)$ # Restore return address

addi $sp$,$ $sp$,8$ # Deallocate stack space

jr $ra # Return