I am making a program in MIPS that will compare two strings but I can't seem to access the proper locations. I have a function that calculates the lenght of the strings which works fine, but when I try to use a different function (in this case its just a test to see if it works), it says that i'm acessing the wrong memory. I am using QTSpim to test it. The function that works is the duzinaStringa, the one that does not is the krajStringa. Currently it's just trying to print out the first character of the string so I can make sure it works
.text
krajStringa:
li $v0,0
li $t0,0 #brojac1
move $t2, $a0 #adresa prvog
move $t3, $a1 #adresa drugog
lb $a0,0($t2)
li $v0,4
syscall
jr $ra
duzinaStringa:
move $t1,$a0
li $t0,0
petlja:
lb $t2,0($t1)
beqz $t2,krajDuzine
addi $t1,$t1,1
addi $t0,$t0,1
j petlja
krajDuzine:
addi $t0,$t0,-1
move $v0,$t0
jr $ra
main:
la $a0,str1
li $v0, 4
syscall
la $a0, arr
li $a1,200
li $v0, 8
syscall
la $a0,str1
li $v0, 4
syscall
la $a0, arr2
li $a1,200
li $v0, 8
syscall
la $a0,arr
jal duzinaStringa
move $a2,$v0
la $a0,arr2
jal duzinaStringa
move $a3,$v0
la $a0,arr
la $a1,arr2
jal krajStringa
li $v0,10
syscall
.data
arr: .space 200
arr2: .space 200
str1: .asciiz "Unesi string: \n"
As @ErikEidt pointed out, I used the wrong system call when printing the first character of a string.