/in/foo.cc: In function 'int main()':
/in/foo.cc:17:2: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(fbi);
  ^~~~
In file included from /in/foo.cc:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.cc:17:10: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
  gets(fbi);
          ^
In file included from /in/foo.cc:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.cc: In function 'void viewTree(int, int)':
/in/foo.cc:33:12: error: 'fbi' cannot be used as a function
   if (fbi(i) == 1) numI++;
            ^
/in/foo.cc:24:6: warning: unused variable 'numF' [-Wunused-variable]
  int numF = 0, numB = 0, numI = 0;
      ^~~~
/in/foo.cc: At global scope:
/in/foo.cc:45:1: error: expected declaration before '}' token
 }
 ^