foo.c: In function 'main':
foo.c:8:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
    8 |     gets(s1);
      |     ^~~~
In file included from /usr/include/stdio.h:867,
                 from foo.c:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:235:1: note: declared here
  235 | gets (char *__str)
      | ^~~~
foo.c:9:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
    9 |  gets(s2);
      |  ^~~~
In file included from /usr/include/stdio.h:867,
                 from foo.c:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:235:1: note: declared here
  235 | gets (char *__str)
      | ^~~~
foo.c:14:20: warning: comparison between pointer and integer
   14 |   if(s1[i]>='a'&&s1<='z')
      |                    ^~
foo.c:19:20: warning: comparison between pointer and integer
   19 |   if(s2[i]>='a'&&s2<='z')
      |                    ^~
foo.c:8:5: warning: ignoring return value of 'gets', declared with attribute warn_unused_result [-Wunused-result]
    8 |     gets(s1);
      |     ^~~~~~~~
foo.c:9:2: warning: ignoring return value of 'gets', declared with attribute warn_unused_result [-Wunused-result]
    9 |  gets(s2);
      |  ^~~~~~~~
/usr/bin/ld: /tmp/ccvseJaj.o: in function `main':
foo.c:(.text.startup+0x4d): warning: the `gets' function is dangerous and should not be used.

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