foo.c: In function 'main':
foo.c:4:5: warning: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    4 |     scanf_s("%d %d", &a, &b);
      |     ^~~~~~~
      |     scanf
foo.c:8:1: error: expected statement before ')' token
    8 | )
      | ^
foo.c:8:1: error: expected declaration or statement at end of input

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