foo.cc: In function 'int main()':
foo.cc:9:8: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
    9 |  gets(s);
      |        ^
In file included from /usr/include/stdio.h:867,
                 from /usr/include/c++/9/cstdio:42,
                 from /usr/include/c++/9/ext/string_conversions.h:43,
                 from /usr/include/c++/9/bits/basic_string.h:6493,
                 from /usr/include/c++/9/string:55,
                 from /usr/include/c++/9/bits/locale_classes.h:40,
                 from /usr/include/c++/9/bits/ios_base.h:41,
                 from /usr/include/c++/9/ios:42,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from foo.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:235:1: note: declared here
  235 | gets (char *__str)
      | ^~~~
foo.cc:9:8: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
    9 |  gets(s);
      |        ^
In file included from /usr/include/stdio.h:867,
                 from /usr/include/c++/9/cstdio:42,
                 from /usr/include/c++/9/ext/string_conversions.h:43,
                 from /usr/include/c++/9/bits/basic_string.h:6493,
                 from /usr/include/c++/9/string:55,
                 from /usr/include/c++/9/bits/locale_classes.h:40,
                 from /usr/include/c++/9/bits/ios_base.h:41,
                 from /usr/include/c++/9/ios:42,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from foo.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:235:1: note: declared here
  235 | gets (char *__str)
      | ^~~~
foo.cc:22:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   22 |  for(;i<len[j]+len[max_len];i++)
      |  ^~~
foo.cc:24:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   24 |   return 0;
      |   ^~~~~~
foo.cc:9:6: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result [-Wunused-result]
    9 |  gets(s);
      |  ~~~~^~~
foo.cc:7:31: warning: 'max_len' may be used uninitialized in this function [-Wmaybe-uninitialized]
    7 |  int len[20]={0},i,j=0,rear=0,max_len;
      |                               ^~~~~~~
/usr/bin/ld: /tmp/ccgKeOlZ.o: in function `main':
foo.cc:(.text.startup+0x4f): warning: the `gets' function is dangerous and should not be used.

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