XOR until '*' or max length is reached
时间: 2024-02-03 10:13:39 浏览: 23
To perform XOR until '*' or a maximum length is reached, you can follow these steps:
1. Define a maximum length for the input strings. Let's say it is `n`.
2. Take two input strings as input and initialize an empty result string.
3. Iterate over the characters of the input strings one by one, until you reach the end of one of the strings or the maximum length `n`.
4. For each character, perform an XOR operation between the ASCII value of the character and the number `42` (which is the ASCII code for `*`).
5. Append the result of the XOR operation to the result string.
6. If the length of the result string is equal to the maximum length `n`, stop iterating.
7. If you reach the end of one of the input strings before reaching the maximum length `n`, append the remaining characters of the other input string to the result string.
8. Return the result string.
Here's some sample Python code to implement this:
```
def xor_until_star(str1, str2, max_len):
res = ''
for i in range(min(len(str1), len(str2))):
if i >= max_len:
break
res += chr(ord(str1[i]) ^ 42 ^ ord(str2[i]))
if str1[i] == '*' or str2[i] == '*':
break
if len(res) < max_len:
if len(str1) < len(str2):
res += str2[len(str1):min(len(str2), max_len - len(res))]
else:
res += str1[len(str2):min(len(str1), max_len - len(res))]
return res
```
In this code, we use the `min` function to ensure that we only iterate up to the minimum length of the input strings. We also use the `chr` function to convert the result of the XOR operation back into a character. Finally, we check if either input string contains a `*` character, and if so, we stop iterating.