Eroare de compilare: user.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ user.cpp:25:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ user.cpp: In function ‘int main()’: user.cpp:27:30: error: ‘ifstream’ was not declared in this scope int N; ifstream("ciur.in")>>N; ^ user.cpp:27:30: note: suggested alternative: In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from user.cpp:1: /usr/include/c++/6/iosfwd:162:34: note: ‘std::ifstream’ typedef basic_ifstream<char> ifstream; ^~~~~~~~ user.cpp:29:24: error: ‘ofstream’ was not declared in this scope ofstream("ciur.out")>>sieve1(N); ^ user.cpp:29:24: note: suggested alternative: In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from user.cpp:1: /usr/include/c++/6/iosfwd:165:34: note: ‘std::ofstream’ typedef basic_ofstream<char> ofstream; ^~~~~~~~