Language: C++

include <iostream>
#include <stdio.h>
#include <math.h>

main(){     
        double r;

        std::cin >> r;

        printf("%.6lf %.6lf\n", M_PI*r*r, 2*M_PI*r );

}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <iostream>
      | ^~~~~~~
In file included from /usr/include/math.h:275,
                 from /usr/include/c++/14/cmath:47,
                 from /usr/include/c++/14/math.h:36,
                 from a.cc:3:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  399 | __MATHDECL (__uintmax_t, ufromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  399 | __MATHDECL (__uintmax_t, ufromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  399 | __MATHDECL (__uintmax_t, ufromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  399 | __MATHDECL (__uintmax_t, ufromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  399 | __MATHDECL (__uintmax_t, ufromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  399 | __MATHDECL (__uintmax_t, ufromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  399 | __MATHDECL (__uintmax_t, ufromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  399 | __MATHDECL (__uintmax_t, ufromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  399 | __MATHDECL (__uintmax_t, ufromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  399 | __MATHDECL (__uintmax_t, ufromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:382:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  382 | __MATHDECL (__intmax_t, fromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:387:1: error: '__uintmax_t' does not name a type; did you mean '__uint128_t'?
  387 | __MATHDECL (__uintmax_t, ufromfp,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:393:1: error: '__intmax_t' does not name a type; did you mean '__int128_t'?
  393 | __MATHDECL (__intmax_t, fromfpx,, (_Mdouble_ __x, int __round,
      | ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:399:1: error: '__uintmax_t' does not name a type; did you m