/in/foo.cc: In function 'int main()':
/in/foo.cc:7:11: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
     while(gets(s))
           ^
In file included from /usr/include/c++/5/cstdio:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:46,
                 from /in/foo.cc:1:
/usr/include/stdio.h:638:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^
/in/foo.cc:7:11: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
     while(gets(s))
           ^
In file included from /usr/include/c++/5/cstdio:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:46,
                 from /in/foo.cc:1:
/usr/include/stdio.h:638:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^
/in/foo.cc:7:17: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
     while(gets(s))
                 ^
In file included from /usr/include/c++/5/cstdio:42:0,
                 from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:46,
                 from /in/foo.cc:1:
/usr/include/stdio.h:638:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^
/tmp/ccpFc1RP.o: In function `main':
foo.cc:(.text.startup+0x2c): warning: the `gets' function is dangerous and should not be used.