/in/foo.cc:16:7: error: invalid preprocessing directive #�
     # 读取矩阵的阶数n
       ^
/in/foo.cc:19:7: error: invalid preprocessing directive #�
     # 读取矩阵A
       ^
/in/foo.cc:22:7: error: invalid preprocessing directive #�
     # 读取矩阵B
       ^
/in/foo.cc:25:7: error: invalid preprocessing directive #�
     # 读取矩阵C
       ^
/in/foo.cc:28:7: error: invalid preprocessing directive #�
     # 计算AB
       ^
/in/foo.cc:31:7: error: invalid preprocessing directive #�
     # 检查AB是否等于C
       ^
/in/foo.cc:34:7: error: invalid preprocessing directive #�
     # 输出结果
       ^
/in/foo.cc:39:7: error: invalid preprocessing directive #�
     # 运行程序
       ^
/in/foo.cc:1:1: error: 'import' does not name a type
 import numpy as np
 ^~~~~~