I'm trying to store and then load an array and I am getting a memory out of bounds error. The program will load and run but anytime I try to access the array for output I get the error.
I want to be able to input a name into one array and a number into another so i can access them seperately. I've purposefully allowed plenty of extra space when my pointer moves in case there is a longer name. There should be enough space for 10 names allotted, but when I try to call the first name that was just input i get a memory out of bounds. I'm assuming I'm not storing the input correctly in the first place but I've stored a string without issue in the same manner before. I also get a bad address/stack read when I try to output the numbers at the end.
.text
.globl __start
start:
la $a0,startPrompt # display welcome prompt
li $v0,4
syscall
li $v0,5 # get employee counter
syscall
move $t9,$v0 # store employee count in an unused register
move $t0,$t9 # move number of employees for loop counter
la $t1,emp # store array address in t1
la $t2,tips # move tips array to t2 for use
la $t3,hours # move hours array to t3 for use
jal inputEmp # jump and link to input employee names
jal reset # jump to reset pointers
jal reload # jump to reload arrays
la $a0,crlf # skip a line
li $v0,4
syscall
#################
# Display Results
#################
dispResult:
la $a0,crlf # skip a line
li $v0,4
syscall
lw $a0,($t1) # display employee's name
li $v0,4
syscall
la $a0,disp1 # display first part of message
li $v0,4
syscall
lw $a0,($t3) # display hours worked
li $v0,1
syscall
la $a0,disp2 # display second part of message
li $v0,4
syscall
lw $t4,($t3) # load hours worked for use
mul $t8,$t4,$t7 # t8 <------ (tip point) * (hours worked)
move $a0,$t8 # display
li $v0,1
syscall
jal movePoint # move to increase pointers
bgtz $t0,dispResult # repeat loop if counter > 0
li $v0,10 # end program
syscall
#################
# Input Emp Names
#################
inputEmp:
la $a0,namePrompt # display name prompt
li $v0,4
syscall
la $a0,($t1) # get name input and store in array
li $a1,16
li $v0,8
syscall
#################
# Input Tip/Hours
#################
inputTip:
la $a0,hourPrompt1 # display first part of hour prompt
li $v0,4
syscall
lw $a0,($t1) # load first employee's name
li $v0,4
syscall
la $a0,hourPrompt2 # display second part of hour prompt
li $v0,4
syscall
li $v0,5 # get employee hour
syscall
sw $v0,($t3) # store tips in array
la $a0,tipPrompt # display tip prompt
li $v0,4
syscall
li $v0,5 # get employee tip
syscall
sw $v0,($t2)
jal movePoint # increase pointers
bgtz $t0,inputEmp # loop to inputTip is counter is above 0
jal reset # reset pointers
la $a0,crlf # skip a line
li $v0,4
syscall
#################
# Calc Total Tips
#################
calcTipTotal:
lw $t4,($t2) # load word into t4 for use
add $t6,$t6,$t4 # add array point to total tips
jal movePoint # jump and link to move pointers
beqz $t0,calcTipTotal # branch to calc point if counter is 0
jal reset # jump to reset pointers
##################
# Calc tip point
##################
div $t7,$t6,$t0 # divide total tips by employees and store in t7
jr $ra
##################
# Reset Pointers
##################
reset:
li $t1,0 # reset name array pointer
li $t2,0 # reset tip array pointer
li $t3,0 # reset hours array pointer
move $t0,$t9 # reset loop counter
jr $ra # jump to return address
##################
# Move Pointers
##################
movePoint:
addi $t1,$t1,16 # move array pointer names
add $t2,$t2,4 # move array pointer tips
add $t3,$t3,4 # move array pointer hours
sub $t0,$t0,1 # subtract one from counter
jr $ra # jump to return address
.data
hours: .space 80
tips: .space 80
emp: .space 160
startPrompt: .asciiz "Good day! How many employees worked today?\t"
namePrompt: .asciiz "Enter an employee's name: "
hourPrompt1: .asciiz "Enter "
hourPrompt2: .asciiz "'s hours: "
tipPrompt: .asciiz "\nAnd their tips: "
crlf: .asciiz "\n"
disp1: .asciiz "\t-Worked Hours: "
disp2: .asciiz "\n\t\tTip Out:"
