如何检测未终止的注释，并在代码中的标准错误流中写入错误消息" error : line X: unterminated comment“？

import sys

def detect_unterminated_comment(filename):
    with open(filename, 'r') as file:
        line_num = 1
        inside_comment = False
        for line in file:
            i = 0
            while i < len(line):
                if not inside_comment and line[i:i+2] == '/*':
                    inside_comment = True
                    i += 2
                elif inside_comment and line[i:i+2] == '*/':
                    inside_comment = False
                    i += 2
                elif inside_comment:
                    i += 1
                else:
                    if line[i:i+2] == '//':
                        break
                    i += 1
            if inside_comment:
                sys.stderr.write(f"error: line {line_num}: unterminated comment\n")
            line_num += 1

if __name__ == '__main__':
    if len(sys.argv) > 1:
        detect_unterminated_comment(sys.argv[1])
    else:
        sys.stderr.write("Please provide a filename as an argument\n")

python detect_comments.py myfile.cpp