指针打印问题：期望输出" 1000 100 10 1"却得到"100 10 1 0"

Hey there! Let's figure out why you're getting that unexpected output—this is a super common hiccup with loop logic, so let's break down the most likely causes:

• You're doing division before printing the initial value
  This is the #1 culprit here. For example, if your code looks something like this:

  num = 1000
  while num > 0:
      num = num // 10  # Divide first
      print(num, end=' ')
  

  You'll start by turning 1000 into 100, then print that—followed by 10, 1, and finally 0 (when num hits 0 after dividing 1 by 10). The fix? Flip the order: print first, then divide:

  num = 1000
  while num > 0:
      print(num, end=' ')  # Print first
      num = num // 10
  

  This way, you start with 1000, then shrink it down step by step without skipping the starting value.

• Your initial value is set incorrectly
  Double-check that you're starting with 1000 and not 100. If you accidentally initialized your variable to 100, looping through divisions would naturally output 100 10 1 0—exactly what you're seeing.

• Loop termination condition is including 0
  If your loop runs while num >= 0 instead of num > 0, it will print 0 once num reaches that value. But even with this, the bigger issue is usually the order of print/division we talked about first.

If you share your actual code, we can pinpoint it even more precisely, but these are the most common fixes for this exact output mismatch.

内容的提问来源于stack exchange，提问作者B.can