foo.c: In function 'main':
foo.c:5:9: warning: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    5 |         scanf_s("%d", &N);
      |         ^~~~~~~
      |         scanf
foo.c:13:25: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   13 |                         for (int x1 = 2; x1 <= n; x1++);
      |                         ^~~
foo.c:14:25: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   14 |                         {if (xx % x1 == 0)
      |                         ^
/nix/store/j2gmfdd29cp3rcvghmn1a5kgcnmf8myp-binutils-2.40/bin/ld: /tmp/ccZrL6vT.o: in function `main':
foo.c:(.text.startup+0x11): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status

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