所以我正在编写一个简单的程序，用于打印自定义字符串在自定义字符串中出现的次数。这是我的代码：
.data
command1: .asciiz "Please enter a sentence "
command2: .asciiz "Please enter a character "
count: .word 10
sentence: .space 100
character: .space 4
command3: .asciiz " Character "
command4: .asciiz " appears in the sentence "
command5: .asciiz " times. "
.text
.globl main
main:
li $t0, 100 #end var for loop
li $t1, 0 #start var for loop
li $t2, 0 #number of occurences
la $a0, command1 #print 'please enter sentence'
li $v0, 4
syscall
la $a0, sentence #input sentence
li $a1, 100
li $v0, 8
syscall
la $a0, command2 #print 'please enter char'
li $v0, 4
syscall
la $a0, character #input character
li $a1, 4
li $v0, 8
syscall
la $s0, character
lb $s1, ($s0)
la $t3, sentence
lb $a2, ($t3) #gets first char of sentence
loop:
#addi $a2, $a2, 1
beq $a2, $zero, end #once reach end of char array, prints result
beq $a2, $s1, something #if the char within sentence == comparing char
addi $a2, $a2, 1 #increment char array
j loop
something:
addi $t2, $t2, 1 #increments number of occurences of char
end:
la $a0, command3
li $v0, 4
syscall
la $a0, character
li $v0, 11
syscall
la $a0, command4
li $v0, 4
syscall
la $a0 sentence
li $v0, 4
syscall
#la $a0, $t2
li $v0, 1
move $a0, $t2
syscall
la $a0, command5
li $v0, 4
syscall
我的问题是，在我输入要与句子进行比较的字符后，程序进入无限循环（$ s2注册表不断更改值）并且没有任何内容被打印。提前谢谢！