foo.c: In function 'main':
foo.c:21:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
  gets(a);
  ^~~~
In file included from foo.c:2:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/ccpJZFrt.o: In function `main':
foo.c:(.text.startup+0x1a): warning: the `gets' function is dangerous and should not be used.

自豪的采用jd5进行评测(github.com/masnn/jd5)

{"receive":"2020-02-23T09:19:31.350Z","handle":"2020-02-23T09:19:31.350Z","done":"2020-02-23T09:19:31.958Z"}