foo.cc: In function 'int main()':
foo.cc:5:13: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
    5 |         gets(st);
      |         ~~~~^~~~
In file included from /nix/store/wy4ywjsch9q2hj5lphqjdg9p2kf7w0ls-gcc-11.3.0/include/c++/11.3.0/cstdio:42,
                 from /nix/store/wy4ywjsch9q2hj5lphqjdg9p2kf7w0ls-gcc-11.3.0/include/c++/11.3.0/x86_64-unknown-linux-gnu/bits/stdc++.h:46,
                 from foo.cc:1:
/nix/store/iczlqwdj10xiz3mmms6adnra0mn3ljk1-glibc-2.35-224-dev/include/stdio.h:605:14: note: declared here
  605 | extern char *gets (char *__s) __wur __attribute_deprecated__;
      |              ^~~~
foo.cc:7:22: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
    7 |         for(int i=0;i<=strlen(st);i++)
      |                     ~^~~~~~~~~~~~
/nix/store/9n9gjvzci75gp2sh1c4rh626dhizqynl-binutils-2.39/bin/ld: /tmp/cchKzCE3.o: in function `main':
foo.cc:(.text.startup+0x10): warning: the `gets' function is dangerous and should not be used.

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