/in/foo.cc: In function 'int main()':
/in/foo.cc:6:2: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(now);gets(before);gets(need);
  ^~~~
In file included from /usr/include/c++/6/cstdio:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:46,
                 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:6:10: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(now);gets(before);gets(need);
          ^
In file included from /usr/include/c++/6/cstdio:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:46,
                 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:6:12: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(now);gets(before);gets(need);
            ^~~~
In file included from /usr/include/c++/6/cstdio:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:46,
                 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:6:23: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(now);gets(before);gets(need);
                       ^
In file included from /usr/include/c++/6/cstdio:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:46,
                 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:6:25: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(now);gets(before);gets(need);
                         ^~~~
In file included from /usr/include/c++/6/cstdio:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:46,
                 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:6:34: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(now);gets(before);gets(need);
                                  ^
In file included from /usr/include/c++/6/cstdio:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:46,
                 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:9:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<strlen(now);i++)
              ~^~~~~~~~~~~~
/in/foo.cc:18:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  else for(int i=0;i<strlen(need);i++)
                   ~^~~~~~~~~~~~~
/tmp/ccuksrVl.o: In function `main':
foo.cc:(.text.startup+0x24): warning: the `gets' function is dangerous and should not be used.