foo.c: In function 'main':
foo.c:5:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'scanf_s'
    5 |         scanf_s("%d %d %d", &a, &b, &c);
      |         ^~~~~~~
foo.c:8:9: error: 't' undeclared (first use in this function)
    8 |         t = a;
      |         ^
foo.c:8:9: note: each undeclared identifier is reported only once for each function it appears in

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