/in/foo.c: In function 'main':
/in/foo.c:10:2: warning: implicit declaration of function 'scanf_s' [-Wimplicit-function-declaration]
  scanf_s("%d", &k);
  ^~~~~~~
/in/foo.c:18:14: error: expected ')' before 'd'
    printf("%"d"\n", i);
              ^
/in/foo.c:18:12: warning: spurious trailing '%' in format [-Wformat=]
    printf("%"d"\n", i);
            ^