该程序在开始时包含主代码，用于调用一个名为print_binary的子例程，其中包含三个测试编号。你的任务是编写print_binary。print_binary的结尾已经写好了：它打印一个新行并返回：
00000000000000000000000000000011
11111111111111111111111111111111
11001010111111101111000000001101
到目前为止，我的输出是：
00000000000000000000000000000000
10000000000000000000000000000000
10000000000000000000000000000000
需要注意的是，我不允许更改main：结尾：
我很感激任何能帮上忙的人，
谢谢你，

.text
main:
    li  $a0, 2
    jal print_binary
    li  $a0, -1
    jal print_binary
    li  $a0, 0xcafef00d
    jal print_binary

    li  $v0, 10             # exit
    syscall

# On entry, a0 = number to print in binary
print_binary:
    li $t1, 32               # Initialize a counter for the bit position (32 bits for unsigned)

loop:
    beqz $t1, end           # Exit the loop if all bits have been processed

    srl $t2, $a0, 31        # Get the most significant bit of the number
    andi $t2, $t2, 1        # Mask the least significant bit
    addi $t2, $t2, 48       # Convert the bit value to ASCII ('0' or '1')

    li $v0, 11              # syscall to print one char
    move $a0, $t2           # Load the bit value into $a0
    syscall

    sll $a0, $a0, 1         # Shift the original number to the left by 1 bit
    addiu $t1, $t1, -1      # Decrement the counter
    j loop

end:
    li $v0, 11              # syscall to print one char
    li $a0, 10              # Load newline character into $a0 ('\n')
    syscall
    jr $ra