我正在制作一个MIPS程序，该程序可以读取和解决kakuro难题。目前它可以读取并打印出拼图，但是我在添加错误检查时遇到了一些问题。我必须做很多检查，由于某种原因，程序都没有按预期终止。如果输入中包含的值不合法（合法值将为：0，或范围1-45内的单个线索，或值为99的单个“块”线索），则您的程序必须打印以下错误消息，并且程序必须终止。法律输入的一些示例：
9999 blocking across and down clues
0799 across clue of 7, blocking down clue
9942 blocking across clue, down clue of 42
1208 across clue of 12, down clue of 8
所以，这就是我在C语言中想到的：
acrossClue = num / 100;
downClue = num % 100;
if(num != 0 && (1 > acrossClue || 45 < acrossClue || acrossClue != 99)
|| (1 > downClue || 45 < downClue || downClue != 99)) {
printf("Illegal input value, Cross sums terminating\n");
return 1;
}
下面是我编写的main和read函数的代码。关于将条件和逻辑转移到MIPS的任何建议？它当前不起作用，因为即使输入不正确，它仍然会运行（即使提前终止，readPuzzle也会返回1），即使输入正确，它也会弄乱拼图。我的想法是，如果输入的不是所检查的任何值，那么该输入将是无效的，但是我猜想这行中的某个地方我没有正确检查，并且搞砸了所有内容。有没有人注意到我在readPuzzle中所做的任何检查？
#
# Name: MAIN PROGRAM
# Description: Main logic for the program.
#
# The program reads these values from standard input:
# 1) an integer representing the size of the puzzle
# 2) integers representing values for each cell for the puzzle
#
# If the dimensions of the board and values of the cells are
# valid, the program then displays the initial puzzle, attempts
# to solve it, and displays the solution if there is one.
.text # this is program code
.align 2 # instructions must be on word boundaries
.globl main # main is a global label
main:
# Allocate stack frame
addi $sp, $sp,-FRAMESIZE_40
sw $ra, 32($sp)
sw $s7, 28($sp)
sw $s6, 24($sp)
sw $s5, 20($sp)
sw $s4, 16($sp)
sw $s3, 12($sp)
sw $s2, 8($sp)
sw $s1, 4($sp)
sw $s0, 0($sp)
la $t0, size
li $v0, READ_INT
syscall
move $s0, $v0 # save size n
blt $s0, MIN_SIZE, size_error
bgt $s0, MAX_SIZE, size_error
sw $v0, 0($t0)
move $a0, $s0
jal readPuzzle
move $t7, $v0
li $v0, PRINT_INT
move $a0, $t7
syscall
beq $v0, $zero, main_done
la $s1, puzzle
li $v0, PRINT_STRING
la $a0, newline
syscall
li $v0, PRINT_STRING
la $a0, banner_border
syscall
li $v0, PRINT_STRING
la $a0, banner_mid
syscall
li $v0, PRINT_STRING
la $a0, banner_border
syscall
li $v0, PRINT_STRING
la $a0, newline
syscall
li $v0, PRINT_STRING
la $a0, initial
syscall
move $a0, $s0
move $a1, $s1
jal printPuzzle
li $v0, PRINT_STRING
la $a0, final
syscall
move $a0, $s0
move $a1, $s1
jal printPuzzle
j main_done
size_error:
li $v0, PRINT_STRING
la $a0, invalid_size
syscall
j main_done
main_done:
# Restore stack frame
lw $ra, 32($sp)
lw $s7, 28($sp)
lw $s6, 24($sp)
lw $s5, 20($sp)
lw $s4, 16($sp)
lw $s3, 12($sp)
lw $s2, 8($sp)
lw $s1, 4($sp)
lw $s0, 0($sp)
addi $sp, $sp, FRAMESIZE_40
jr $ra
# Name: readPuzzle
#
# Description: Reads in the puzzle from a file or stdin.
#
# Arguments: a0 The size n
#
# Returns: 1 if the read was successful, otherwise 0
#
readPuzzle:
addi $sp, $sp, -FRAMESIZE_40
sw $ra, 32($sp)
sw $s7, 28($sp)
sw $s6, 24($sp)
sw $s5, 20($sp)
sw $s4, 16($sp)
sw $s3, 12($sp)
sw $s2, 8($sp)
sw $s1, 4($sp)
sw $s0, 0($sp)
move $s0, $a0
mul $s1, $s0, $s0 # get n * n
li $s2, 0
la $s3, puzzle
li $s4, 4
li $s5, 0 # row = 0
li $s6, 0 # col = 0
mul $s1, $s1, $s4 # get (n * n) * 4 bytes
li $t1, 100
j read_loop
read_loop:
beq $s2, $s1, read_done
beq $s5, $s1, reset
li $v0, READ_INT
syscall
move $s7, $v0
beq $s7, $zero, continue
div $s7, $t1
mflo $t2 # acrossClue = num / 100
mfhi $t3 # downClue = num % 100
seq $t4, $t2, Block_Value
seq $t5, $t3, Block_Value
seq $t6, $t4, $t5
bne $t6, $zero, continue
li $t6, MIN_CLUE # minimum value = 2
li $t7, MAX_CLUE # maximum value = 45
slt $t4, $t2, $t6 # 1 if acrossClue < 2, otherwise 0
slt $t5, $t7, $t2 # 1 if acrossClue > 45, otherwise 0
bne $t4, $zero, illegal_input
bne $t5, $zero, illegal_input
slt $t4, $t3, $t6 # 1 if downClue < 2, otherwise 0
slt $t5, $t7, $t3 # 1 if downClue > 45, otherwise 0
bne $t4, $zero, illegal_input
bne $t5, $zero, illegal_input
j continue
continue:
move $a0, $s5
move $a1, $s6
move $a2, $s7
jal setElement
addi $s6, $s6, 1
addi $s2, $s2, 4
j read_loop
reset:
addi $s5, $s5, 1
li $s6, 0
illegal_input:
li $v0, PRINT_STRING
la $a0, invalid_input
syscall
li $v0, 0
j read_done
read_done:
li $v0, 1
lw $ra, 32($sp)
lw $s7, 28($sp)
lw $s6, 24($sp)
lw $s5, 20($sp)
lw $s4, 16($sp)
lw $s3, 12($sp)
lw $s2, 8($sp)
lw $s1, 4($sp)
lw $s0, 0($sp)
addi $sp, $sp, FRAMESIZE_40
jr $ra
编辑：我得到了它，以便它可以正确知道何时输入有效或无效，但是当输入值无效时，它仍然不会终止。