foo.c: In function 'main':
foo.c:6:9: warning: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    6 |         scanf_s("%d,%d", &x1, &x2);
      |         ^~~~~~~
      |         scanf
foo.c:14:16: error: invalid suffix "；" on integer constant
   14 |         return 0；
      |                ^~~
foo.c:14:19: error: expected ';' before '}' token
   14 |         return 0；
      |                   ^
      |                   ;
   15 | }
      | ~                  

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