foo.c: In function 'main':
foo.c:27:9: warning: 'gets' is deprecated [-Wdeprecated-declarations]
   27 |         gets(s1);
      |         ^~~~
In file included from foo.c:1:
/nix/store/linb70pgp53f0kygxm5wk163dx22d681-glibc-2.37-45-dev/include/stdio.h:605:14: note: declared here
  605 | extern char *gets (char *__s) __wur __attribute_deprecated__;
      |              ^~~~
foo.c:28:9: warning: 'gets' is deprecated [-Wdeprecated-declarations]
   28 |         gets(s2);
      |         ^~~~
/nix/store/linb70pgp53f0kygxm5wk163dx22d681-glibc-2.37-45-dev/include/stdio.h:605:14: note: declared here
  605 | extern char *gets (char *__s) __wur __attribute_deprecated__;
      |              ^~~~
foo.c:30:41: error: expected ')' before ';' token
   30 |         printf("%d %d",Diff(s1),Diff(s2);
      |               ~                         ^
      |                                         )
foo.c:32:18: error: expected ';' before '}' token
   32 |         return 0;
      |                  ^
      |                  ;
   33 | }
      | ~                 

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