/in/foo.c:1:1: error: unknown type name 'def'
    1 | def calculate_triangle_perimeter():
      | ^~~
/in/foo.c: In function 'calculate_triangle_perimeter':
/in/foo.c:1:35: error: expected declaration specifiers before ':' token
    1 | def calculate_triangle_perimeter():
      |                                   ^
/in/foo.c:7:11: error: invalid preprocessing directive #\U000068c0\U000067e5\U0000662f\U00005426\U0000662f\U00004e09\U00006761\U00008fb9
    7 |         # 检查是否是三条边
      |           ^~~~~~~~~~~~~~~~
/in/foo.c:16:34: error: stray '#' in program
   16 |         a, b, c = sorted(sides)  # 排序以便比较
      |                                  ^
/in/foo.c:28: warning: control reaches end of non-void function [-Wreturn-type]