This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.
Step 1:利用for循环给i赋值为0
Step 2:利用if条件判断学号是否一致
Step 3:利用二次循环找出所有符合条件的学生
Step 4：利用if条件语句能否找到该学生
