/in/foo.c: In function 'main':
/in/foo.c:9:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
gets(s);
^~~~
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:27:9: warning: 'sum' may be used uninitialized in this function [-Wmaybe-uninitialized]
{ b[j]=sum;
~~~~^~~~
/tmp/ccvT5uHe.o: In function `main':
foo.c:(.text.startup+0x2d): warning: the `gets' function is dangerous and should not be used.