foo.c: In function 'main':
foo.c:7:9: warning: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    7 |         scanf_s("%d%d", &x1, &x2);
      |         ^~~~~~~
      |         scanf
foo.c:9:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    9 |         if (x1 < x2)
      |         ^~
foo.c:11:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   11 |                 x1 = x2;
      |                 ^~
foo.c:18:9: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   18 |         while (flag != 0)
      |         ^~~~~
foo.c:20:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   20 |                 x2 = flag;
      |                 ^~
foo.c:16:14: warning: 'temp' may be used uninitialized [-Wmaybe-uninitialized]
   16 |         flag = x1 % x2;
      |         ~~~~~^~~~~~~~~
foo.c:6:30: note: 'temp' was declared here
    6 |         int x1, x2, p, flag, temp;
      |                              ^~~~
/nix/store/j2gmfdd29cp3rcvghmn1a5kgcnmf8myp-binutils-2.40/bin/ld: /tmp/ccIeop7I.o: in function `main':
foo.c:(.text.startup+0x16): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status

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