foo.cc:3:10: error: conversion from ‘double’ to ‘long unsigned int’ in a converted constant expression
    3 | int p[1e5+5];
      |       ~~~^~
foo.cc:3:10: error: could not convert ‘(1.0e+5 + (double)5)’ from ‘double’ to ‘long unsigned int’
    3 | int p[1e5+5];
      |       ~~~^~
      |          |
      |          double
foo.cc:3:10: error: size of array ‘p’ has non-integral type ‘double’