foo.cc: In function 'int main(int, char**)':
foo.cc:17:13: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
   17 |         gets(ary_cExpression);
      |         ~~~~^~~~~~~~~~~~~~~~~
In file included from /nix/store/h5kvfrjmpw792v8jg7nrzfkffmn0iyy8-gcc-12.3.0/include/c++/12.3.0/cstdio:42,
                 from /nix/store/h5kvfrjmpw792v8jg7nrzfkffmn0iyy8-gcc-12.3.0/include/c++/12.3.0/ext/string_conversions.h:43,
                 from /nix/store/h5kvfrjmpw792v8jg7nrzfkffmn0iyy8-gcc-12.3.0/include/c++/12.3.0/bits/basic_string.h:3968,
                 from /nix/store/h5kvfrjmpw792v8jg7nrzfkffmn0iyy8-gcc-12.3.0/include/c++/12.3.0/string:53,
                 from /nix/store/h5kvfrjmpw792v8jg7nrzfkffmn0iyy8-gcc-12.3.0/include/c++/12.3.0/bits/locale_classes.h:40,
                 from /nix/store/h5kvfrjmpw792v8jg7nrzfkffmn0iyy8-gcc-12.3.0/include/c++/12.3.0/bits/ios_base.h:41,
                 from /nix/store/h5kvfrjmpw792v8jg7nrzfkffmn0iyy8-gcc-12.3.0/include/c++/12.3.0/ios:42,
                 from /nix/store/h5kvfrjmpw792v8jg7nrzfkffmn0iyy8-gcc-12.3.0/include/c++/12.3.0/ostream:38,
                 from iostream:39:
/nix/store/y8wfrgk7br5rfz4221lfb9v8w3n0cnyd-glibc-2.37-8-dev/include/stdio.h:605:14: note: declared here
  605 | extern char *gets (char *__s) __wur __attribute_deprecated__;
      |              ^~~~
foo.cc:28:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         while (nIndex < strExpression.size())
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:46:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |         while (nIndex < strExpression.size())
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:95:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<CharUnit>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |                         for (int i = 0; i < vtLeftSet.size(); i++)
      |                                         ~~^~~~~~~~~~~~~~~~~~
foo.cc:27:25: warning: unused variable 'nDepth' [-Wunused-variable]
   27 |         int nIndex = 0, nDepth = 0;
      |                         ^~~~~~
foo.cc:81:27: warning: unused variable 'nRightTag' [-Wunused-variable]
   81 |         int nLeftTag = 0, nRightTag = 0;
      |                           ^~~~~~~~~
/nix/store/74y3751gsixaz9797ib0hp7c658sp1y5-binutils-2.40/bin/ld: /tmp/ccpS6pJm.o: in function `main':
foo.cc:(.text.startup+0x22): warning: the `gets' function is dangerous and should not be used.

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