Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:33:21: error: no matching function for call to ‘std::basic_string<char>::swap(std::string)’ input.swap(string()); ^ user.cpp:33:21: note: candidate is: In file included from /usr/include/c++/4.8/string:52:0, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/c++/4.8/bits/basic_string.h:1790:7: note: void std::basic_string<_CharT, _Traits, _Alloc>::swap(std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>] swap(basic_string& __s); ^ /usr/include/c++/4.8/bits/basic_string.h:1790:7: note: no known conversion for argument 1 from ‘std::string {aka std::basic_string<char>}’ to ‘std::basic_string<char>&’ user.cpp:34:6: error: ‘std::istringstream’ has no member named ‘swap’ fin.swap(istringstream()); ^ user.cpp:10:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algsort.in", "r", stdin); ^ user.cpp:11:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algsort.out", "w", stdout); ^