foo.cc: In function 'int main()':
foo.cc:15:11: warning: format '%n' expects argument of type 'int*', but argument 2 has type 'char*' [-Wformat=]
   15 |   scanf("%n\n%s%d%d%c%c%d",&d,&x,&a,&c,&d,&e,&b);
      |          ~^                ~~
      |           |                |
      |           int*             char*
      |          %hhn
foo.cc:15:15: warning: format '%s' expects argument of type 'char*', but argument 3 has type 'std::string*' {aka 'std::__cxx11::basic_string<char>*'} [-Wformat=]
   15 |   scanf("%n\n%s%d%d%c%c%d",&d,&x,&a,&c,&d,&e,&b);
      |              ~^               ~~
      |               |               |
      |               char*           std::string* {aka std::__cxx11::basic_string<char>*}
foo.cc:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   15 |   scanf("%n\n%s%d%d%c%c%d",&d,&x,&a,&c,&d,&e,&b);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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