foo.c: In function 'main':
foo.c:6:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
    6 |  gets(a);
      |  ^~~~
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:8:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
    8 |  gets(b);
      |  ^~~~
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:10:33: warning: unused variable 'n' [-Wunused-variable]
   10 |  int i = 0, i2 = 0, j, k, l, m, n;
      |                                 ^
foo.c:10:30: warning: unused variable 'm' [-Wunused-variable]
   10 |  int i = 0, i2 = 0, j, k, l, m, n;
      |                              ^
foo.c:10:27: warning: unused variable 'l' [-Wunused-variable]
   10 |  int i = 0, i2 = 0, j, k, l, m, n;
      |                           ^
foo.c:6:2: warning: ignoring return value of 'gets', declared with attribute warn_unused_result [-Wunused-result]
    6 |  gets(a);
      |  ^~~~~~~
foo.c:8:2: warning: ignoring return value of 'gets', declared with attribute warn_unused_result [-Wunused-result]
    8 |  gets(b);
      |  ^~~~~~~
In file included from /usr/include/string.h:495,
                 from foo.c:2:
In function 'strcpy',
    inlined from 'main' at foo.c:26:5:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:90:10: warning: '__builtin_strcpy' accessing 1 byte at offsets [0, 100] and [0, 100] may overlap 1 byte at offset 0 [-Wrestrict]
   90 |   return __builtin___strcpy_chk (__dest, __src, __bos (__dest));
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccXFIVoH.o: in function `main':
foo.c:(.text.startup+0x36): warning: the `gets' function is dangerous and should not be used.

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