src.c:1:1: error: unknown type name 'def'
def find_missing_number(total_numbers, numbers):
^
src.c: In function 'find_missing_number':
src.c:1:48: error: expected declaration specifiers before ':' token
def find_missing_number(total_numbers, numbers):
^
src.c:9:2: error: invalid preprocessing directive #�
#依次输入 n-1 个数字
^