Eroare de compilare: main.cpp:15:5: error: 'int time' redeclared as different kind of entity 15 | int time = 0; | ^~~~ In file included from /usr/include/pthread.h:23, from /usr/include/x86_64-linux-gnu/c++/10/bits/gthr-default.h:35, from /usr/include/x86_64-linux-gnu/c++/10/bits/gthr.h:148, from /usr/include/c++/10/ext/atomicity.h:35, from /usr/include/c++/10/bits/ios_base.h:39, from /usr/include/c++/10/ios:42, from /usr/include/c++/10/istream:38, from /usr/include/c++/10/fstream:38, from main.cpp:1: /usr/include/time.h:75:15: note: previous declaration 'time_t time(time_t*)' 75 | extern time_t time (time_t *__timer) __THROW; | ^~~~ main.cpp: In member function 'void DSU::join(int, int)': main.cpp:45:36: warning: ISO C++ forbids incrementing a pointer of type 'time_t (*)(time_t*) throw ()' {aka 'long int (*)(long int*)'} [-Wpointer-arith] 45 | roll_stack[++ sp] = {++ time, sup_u, father[sup_u], size_of[sup_u]}; | ^~~~ main.cpp:45:36: error: lvalue required as increment operand main.cpp:45:78: error: no match for 'operator=' (operand types are 'DSU::define_status' and '<brace-enclosed initializer list>') 45 | roll_stack[++ sp] = {++ time, sup_u, father[sup_u], size_of[sup_u]}; | ^ main.cpp:18:16: note: candidate: 'constexpr DSU::define_status& DSU::define_status::operator=(const DSU::define_status&)' 18 | struct define_status { | ^~~~~~~~~~~~~ main.cpp:18:16: note: no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const DSU::define_status&' main.cpp:18:16: note: candidate: 'constexpr DSU::define_status& DSU::define_status::operator=(DSU::define_status&&)' main.cpp:18:16: note: no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'DSU::define_status&&' main.cpp:46:36: warning: ISO C++ forbids incrementing a pointer of type 'time_t (*)(time_t*) throw ()' {aka 'long int (*)(long int*)'} [-Wpointer-arith] 46 | roll_stack[++ sp] = {++ time, sup_v, father[sup_v], size_of[sup_v]}; | ^~~~ main.cpp:46:36: error: lvalue required as increment operand main.cpp:46:78: error: no match for 'operator=' (operand types are 'DSU::define_status' and '<brace-enclosed initializer list>') 46 | roll_stack[++ sp] = {++ time, sup_v, father[sup_v], size_of[sup_v]}; | ^ main.cpp:18:16: note: candidate: 'constexpr DSU::define_status& DSU::define_status::operator=(const DSU::define_status&)' 18 | struct define_status { | ^~~~~~~~~~~~~ main.cpp:18:16: note: no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const DSU::define_status&' main.cpp:18:16: note: candidate: 'constexpr DSU::define_status& DSU::define_status::operator=(DSU::define_status&&)' main.cpp:18:16: note: no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'DSU::define_status&&' main.cpp: In member function 'void DSU::roll_back()': main.cpp:59:19: warning: ISO C++ forbids decrementing a pointer of type 'time_t (*)(time_t*) throw ()' {aka 'long int (*)(long int*)'} [-Wpointer-arith] 59 | sp --; time --; | ^~~~ main.cpp:59:19: error: lvalue required as decrement operand main.cpp:64:19: warning: ISO C++ forbids decrementing a pointer of type 'time_t (*)(time_t*) throw ()' {aka 'long int (*)(long int*)'} [-Wpointer-arith] 64 | sp --; time --; | ^~~~ Non zero exit status: 1