Compilare: In file included from /usr/include/c++/12.2.1/cmath:47, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:41, from main.cpp:1: In function 'constexpr double std::abs(double)', inlined from 'int main()' at main.cpp:27:15: /usr/include/c++/12.2.1/bits/std_abs.h:72:30: warning: 'aria' may be used uninitialized [-Wmaybe-uninitialized] 72 | { return __builtin_fabs(__x); } | ^ main.cpp: In function 'int main()': main.cpp:19:12: note: 'aria' was declared here 19 | double aria; | ^~~~