/in/foo.cc: In function 'int main()':
/in/foo.cc:8:2: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(str);
  ^~~~
In file included from /usr/include/c++/6/cstdio:42:0,
                 from /usr/include/c++/6/ext/string_conversions.h:43,
                 from /usr/include/c++/6/bits/basic_string.h:5417,
                 from /usr/include/c++/6/string:52,
                 from /usr/include/c++/6/bits/locale_classes.h:40,
                 from /usr/include/c++/6/bits/ios_base.h:41,
                 from /usr/include/c++/6/ios:42,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from /in/foo.cc:1:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.cc:8:10: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(str);
          ^
In file included from /usr/include/c++/6/cstdio:42:0,
                 from /usr/include/c++/6/ext/string_conversions.h:43,
                 from /usr/include/c++/6/bits/basic_string.h:5417,
                 from /usr/include/c++/6/string:52,
                 from /usr/include/c++/6/bits/locale_classes.h:40,
                 from /usr/include/c++/6/bits/ios_base.h:41,
                 from /usr/include/c++/6/ios:42,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from /in/foo.cc:1:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.cc:10:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0; i<strlen(str); i++)
              ~^~~~~~~~~~~~
/in/foo.cc:7:9: warning: unused variable 'len' [-Wunused-variable]
     int len,i;
         ^~~
/in/foo.cc:9:23: warning: unused variable 'x' [-Wunused-variable]
     int count=0,max=0,x=0,y=0;
                       ^
/in/foo.cc:9:27: warning: unused variable 'y' [-Wunused-variable]
     int count=0,max=0,x=0,y=0;
                           ^
/tmp/ccdf5CLC.o: In function `main':
foo.cc:(.text.startup+0xf): warning: the `gets' function is dangerous and should not be used.