我正在做作业，我必须提示用户输入一定数量的浮点数，将它们存储在数组中并打印出包含重复项的第一个数字。这是C中的随附代码。
void main( )
{
int arraysize = 25;
float array[arraysize];
int i, j, howMany;
float num, temp;
printf("Specify how many numbers should be stored in the array (at most 25):\n");
scanf("%d", &howMany);
//The following loop reads in floating point numbers
//and stores them into the array
i = 0;
while (i < arraysize && i < howMany)
{
printf("Enter a number:\n");
//read an integer from a user input and store it in num
scanf("%f", &num);
array[i] = num;
i++;
}
//Print out each number in the array
printf("The original array contains the following:\n");
i = 0;
while (i < arraysize && i < howMany)
{
printf("%f\n", array[i]);
i++;
}
//Compute which number appears most
float maxValue = array[0];
int maxCount = 0;
for (i = 0; i < arraysize && i < howMany; i++)
{
int count = 0;
for (j = 0; j < arraysize && j < howMany; j++)
{
if ((array[j] - array[i]) < 0.0001 && (array[j] - array[i]) > -0.0001)
{
count++;
}
}
if (count > maxCount)
{
maxCount = count;
maxValue = array[i];
}
}
printf("The number that appears most is %f and it appears %d time(s)\n", maxValue, maxCount);
return;
}
这是我在MIPS中的实现。
numbers: .space 100 # float numbers[arraysize]
newline: .asciiz "\n"
message1: .asciiz "Specify how many numbers should be stored in the array (at most 25):\n"
message2: .asciiz "Enter a number:\n"
message3: .asciiz "The original array contains the following:\n"
message4: .asciiz "The number that appears most is "
message5: .asciiz " and it appears "
message6: .asciiz " time(s)\n"
.text
.globl main # defines a global main function
main:
la $a0, message1
li $v0, 4
syscall # print "Specify how many numbers should be stored in the array (at most 25):\n"
li $v0, 5
syscall
move $s0, $v0 # int howMany
li $s1, 0 # int i = 0
li $s2, 25 # int arraySize = 25
li $t3, 0 # used in conjunction with float array
li $s6, 0 # int j = 0
while_read:
read_conditional1:
slt $t0, $s1, $s2 # i < arraySize
bne $t0, 0, read_conditional2
j end_read
read_conditional2:
slt $t1, $s1, $s0 # i < howMany
bne $t1, 0, read_body
j end_read
read_body:
la $a0, message2
li $v0, 4
syscall # print "Enter a number:\n"
li $v0, 6
syscall # read user input (value will be stored in $f0)
mov.s $f12, $f0 # $f12 is the argument register for floating point numbers
s.s $f12, numbers($t3) # sw equivalent
addi $t3, $t3, 4
addi $s1, $s1, 1 # i++
j while_read
end_read:
li $s1, 0 # int i = 0
li $t3, 0 # necessary for address
la $a0, message3
li $v0, 4
syscall # print "The original array contains the following:\n"
while_print:
print_conditional1:
slt $t0, $s1, $s2 # i < arraySize
bne $t0, 0, print_conditional2
j end_print
print_conditional2:
slt $t1, $s1, $s0 # i < howMany
bne $t1, 0, print_body
j end_print
print_body:
l.s $f12, numbers($t3) # load floating point value
li $v0, 2
syscall # array[i] is printed
la $a0, newline
li $v0, 4
syscall # newline is printed
addi $t3, $t3, 4
addi $s1, $s1, 1 # i++
j while_print
end_print:
li $s1, 0 # int i = 0
li $t4, 0 # use for array[i]
li $t7, 0
l.s $f1, numbers($t7) # float maxValue = array[0]
li $s4, 0 # int maxCount = 0
for_compute:
compute_conditional1:
slt $t0, $s1, $s2 # i < arraySize
bne $t0, 0, compute_conditional2
j end_compute
compute_conditional2:
slt $t1, $s1, $s0 # i < howMany
bne $t1, 0, compute_body
j end_compute
compute_body:
li $s5, 0 # int count = 0
li $t5, 0 # use for array[j]
for_compare:
compare_conditional1:
slt $t0, $s6, $s2 # j < arraySize
bne $t0, 0, compare_conditional2
j end_compare
compare_conditional2:
slt $t1, $6, $s0 # j < howMany
bne $t1, 0, compare_body
j end_compare
compare_body: # this is being skipped over!!!!
l.s $f2, numbers($t4) # array[i]
l.s $f4, numbers($t5) # array[j]
sub.s $f6, $f4, $f2 # array[j] - array[i]
li.s $f8, 0.0001
li.s $f10, -0.0001
la $a0, message1 # test
li $v0, 4
syscall
array_conditional1:
c.lt.s $f6, $f8 # array[j] - array[i] < 0.0001
bc1t array_conditional2
j end_array_conditional
array_conditional2:
c.lt.s $f6, $f10 # array[j] - array[i] > -0.0001
bc1f array_body
j end_array_conditional
array_body:
addi $s5, $s5, 1 # count++
end_array_conditional:
addi $s6, $s6, 1 # j++
addi $t5, $t5, 4
j for_compare
end_compare:
la $a0, message3 # test
li $v0, 4
syscall
slt $t0, $s5, $s4 # if (count > maxCount)
bne $t0, 1, count_body
j end_body
count_body:
move $s4, $s5 # maxCount = count
mov.s $f1, $f2 # maxValue = array[i]
end_body:
addi $s1, $s1, 1 # i++
addi $t4, $t4, 4
j for_compute
end_compute:
la $a0, message4
li $v0, 4
syscall # print "The number that appears most is "
mov.s $f12, $f1 # move float maxValue into argument register
li $v0, 2
syscall
jr $ra
我遇到的问题几乎在代码的结尾。在for_compare循环的compare_conditional2中，不相等的分支语句从不跳转到compare_body，因此j end_compare是始终执行的对象。谁能帮我找出原因吗？