/in/foo.c: In function 'main':
/in/foo.c:12:24: error: expected ';' before '\U0000ff1b'
   12 |     printf("%d\n", sum)；
      |                        ^~
      |                        ;
/in/foo.c:13:5: error: expected declaration or statement at end of input
   13 |     return 0;
      |     ^~~~~~