/in/foo.c: In function 'main':
/in/foo.c:12:2: 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: In function 'opp':
/in/foo.c:23:3: warning: statement with no effect [-Wunused-value]
for(i;s[i]!=' ';i++)
^~~
/in/foo.c:27:3: warning: statement with no effect [-Wunused-value]
for(i;s[i]==' ';i++)
^~~
/tmp/ccugltQL.o: In function `main':
foo.c:(.text.startup+0x9): warning: the `gets' function is dangerous and should not be used.