MIPS用户输入数组存储和打印麻烦

Question

我正在尝试用MIPS编写一个程序，提示用户猜测从随机数生成器生成的随机数。他们有10次尝试正确猜测或他们输了。一旦游戏结束，它将告诉用户他们是赢还是输，并将打印出他们猜到的数字数组。我无法存储用户的输入并在完成游戏后显示回来。

Answer 1

您可以使用动态内存来存储猜测，方法是通过每次猜测递增指针的偏移量：

li $v0, 9       #allocate memory for new record
li $a0, 60      #enough memory for 15 guesses
syscall
move $s0, $v0   #hang onto the initial address of our array (memory)

li $t6, 0       #Current Offset of our array = 0

然后，在你的循环中：

li $v0, 5           #enter integer
syscall

add $s1, $s0, $t6   #add our offset to our initial memory location

sw $v0, 0($s1)      #Store our guess in the offset location

add $t6, $t6, 4     #add 4 to our offset

要显示它们，您可以这样做：

showlist:         #Show us what we guessed

li $t1, 0         #Set our initial offset to 0

listloop:
add $s1, $s0, $t1 #Add our offset to our initial memory location

li $v0, 1
lw $a0, 0($s1)    #Print the number at our memory address + offset
syscall

add $t1, $t1, 4    #Add 4 to our offset
bge $t1, $t6, done #If our offset is >= our final guess offset, we're done

li $v0, 4         #Printa coma and space
la $a0, space
syscall

j listloop

请参阅以下完整解决方案：

#t0 = Number to guess
.data
nl: .asciiz "\n"
space: .asciiz ", "
prompt1: "\nPlease enter a number: "
toohigh: "\nYou guessed too high"
toolow: "\nYou guessed too low"
winner: "\nThat's correct! You Win!"
guesses: "\nHere are your guesses: "
youlose: "\nYou Lose!"
youlose2: "\nThe Correct Number Was: "
.text

################Generate our random number###################
li $v0, 42      #random number generator
li $a1, 21      #upper bound, gen number from 0-20
syscall         # runs whatever is in $v0 (command 42-RNG)
move $t0, $a0   #move stuff from $a0 to $t0
############################################################

li $v0, 9       #allocate memory for new record
li $a0, 60      #enough memory for 15 guesses
syscall
move $s0, $v0   #hang onto the initial address of our array (memory)

li $t6, 0       #Current Offset of our array = 0

##################
# Our Guess Loop #
##################
loop:
li $v0, 4       #prompt for Number:
la $a0, prompt1
syscall

li $v0, 5           #enter integer
syscall

add $s1, $s0, $t6   #add our offset to our initial memory location

sw $v0, 0($s1)      #Store our guess in the offset location

add $t6, $t6, 4     #add 4 to our offset
beq $v0, $t0, win   #Did we win?
bge $t6, 60, lose   #Did we lose? (60 = 4 * 15) We can use that to tell how many guesses we tried
blt $v0, $t0, less  #Is our number less than the right number?

li $v0, 4           #Must have guessed too high - let us know
la $a0, toohigh
syscall
j loop

less:
li $v0, 4           #Must have guessed too low - let us know
la $a0, toolow
syscall
j loop
###################

win:
li $v0, 4          #We won!
la $a0, winner
syscall

showlist:         #Show us what we guessed
li $v0, 4
la $a0, guesses
syscall

li $t1, 0         #Set our initial offset to 0

listloop:
add $s1, $s0, $t1 #Add our offset to our initial memory location

li $v0, 1
lw $a0, 0($s1)    #Print the number at our memory address + offset
syscall

add $t1, $t1, 4    #Add 4 to our offset
bge $t1, $t6, done #If our offset is >= our final guess offset, we're done

li $v0, 4         #Printa coma and space
la $a0, space
syscall

j listloop

lose:              #We lost
li $v0, 4
la $a0, youlose    #Let us know
syscall

li $v0, 4
la $a0, youlose2  #Display "The correct number was: "
syscall

move $a0, $t0    #Move the right number into $a0 to display it
li $v0, 1
syscall

j showlist        #Then show us our guesses

done:
li $v0, 10          #Terminate Program
syscall

<强> WIN：

<强>输