foo.c: In function 'main':
foo.c:6:9: warning: 'gets' is deprecated [-Wdeprecated-declarations]
6 | gets(ch);
| ^~~~
In file included from foo.c:1:
/nix/store/linb70pgp53f0kygxm5wk163dx22d681-glibc-2.37-45-dev/include/stdio.h:605:14: note: declared here
605 | extern char *gets (char *__s) __wur __attribute_deprecated__;
| ^~~~
foo.c:13:23: warning: 'a' may be used uninitialized [-Wmaybe-uninitialized]
13 | for (int i = a[0] - 1; i >= 0; i--)
| ~^~~
foo.c:8:13: note: 'a' declared here
8 | int a[100000],j=0;//储存空格的位置
| ^
/nix/store/3r87a2wq1w4l66wnsm7rqvy608mx23h6-binutils-2.40/bin/ld: /tmp/ccO1QtER.o: in function `main':
foo.c:(.text.startup+0x13): warning: the `gets' function is dangerous and should not be used.
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