Compilare: main.cpp: In function 'int main()': main.cpp:69:17: warning: unused variable 'v1' [-Wunused-variable] 69 | int v1=mat[0][j-1]; | ^~ main.cpp:70:17: warning: unused variable 'v2' [-Wunused-variable] 70 | int v2=mat[0][j+1]; | ^~ main.cpp:75:23: warning: 'primuldrum' may be used uninitialized [-Wmaybe-uninitialized] 75 | mat[0][primuldrum]=m; | ~~~~~~~~~~~~~~~~~~^~ main.cpp:45:9: note: 'primuldrum' was declared here 45 | int primuldrum; | ^~~~~~~~~~ In file included from /usr/include/c++/12.2.1/bits/stl_pair.h:61, from /usr/include/c++/12.2.1/bits/stl_algobase.h:64, from /usr/include/c++/12.2.1/bits/specfun.h:45, from /usr/include/c++/12.2.1/cmath:1935, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:41, from main.cpp:1: In function 'constexpr std::_Require<std::__not_<std::__is_tuple_like<_Tp> >, std::is_move_constructible<_Tp>, std::is_move_assignable<_Tp> > std::swap(_Tp&, _Tp&) [with _Tp = int]', inlined from 'int main()' at main.cpp:36:21: /usr/include/c++/12.2.1/bits/move.h:206:11: warning: 'poz' may be used uninitialized [-Wmaybe-uninitialized] 206 | __b = _GLIBCXX_MOVE(__tmp); | ^ main.cpp: In function 'int main()': main.cpp:21:9: note: 'poz' was declared here 21 | int poz; | ^~~