/in/foo.c: In function 'main':
/in/foo.c:27:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
  gets(str);
  ^~~~
In file included from /in/foo.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.c:25:16: warning: unused variable 'res' [-Wunused-variable]
  int n,count=1,res=0;
                ^~~
/in/foo.c:25:8: warning: unused variable 'count' [-Wunused-variable]
  int n,count=1,res=0;
        ^~~~~
/in/foo.c:25:6: warning: unused variable 'n' [-Wunused-variable]
  int n,count=1,res=0;
      ^
/tmp/ccOeS8o7.o: In function `main':
foo.c:(.text.startup+0xf): warning: the `gets' function is dangerous and should not be used.