Eroare de compilare: user.cpp:17:13: error: ‘int y1’ redeclared as different kind of symbol int n,x1,x2,y1,sol,i; ^ In file included from /usr/include/features.h:357:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/os_defines.h:39, from /usr/include/i386-linux-gnu/c++/4.8/bits/c++config.h:420, from /usr/include/c++/4.8/cstdio:41, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:243:1: error: previous declaration of ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:76:12: error: assignment of function ‘double y1(double)’ y1 = numar(); ^ user.cpp:76:12: error: cannot convert ‘int’ to ‘double(double)throw ()’ in assignment user.cpp:83:57: error: no matching function for call to ‘std::vector<std::pair<std::pair<int, int>, int> >::push_back(std::pair<std::pair<int, double (*)(double)throw ()>, int>)’ sus.push_back(make_pair(make_pair(x1, y1),i)); ^ user.cpp:83:57: note: candidates are: In file included from /usr/include/c++/4.8/vector:64:0, from /usr/include/c++/4.8/bits/random.h:34, from /usr/include/c++/4.8/random:50, from /usr/include/c++/4.8/bits/stl_algo.h:65, from /usr/include/c++/4.8/algorithm:62, from user.cpp:2: /usr/include/c++/4.8/bits/stl_vector.h:901:7: note: void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::pair<std::pair<int, int>, int>; _Alloc = std::allocator<std::pair<std::pair<int, int>, int> >; std::vector<_Tp, _Alloc>::value_type = std::pair<std::pair<int, int>, int>] push_back(const value_type& __x) ^ /usr/include/c++/4.8/bits/stl_vector.h:901:7: note: no known conversion for argument 1 from ‘std::pair<std::pair<int, double (*)(double)throw ()>, int>’ to ‘const value_type& {aka const std::pair<std::pair<int, int>, int>&}’ /usr/include/c++/4.8/bits/stl_vector.h:919:7: note: void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::pair<std::pair<int, int>, int>; _Alloc = std::allocator<std::pair<std::pair<int, int>, int> >; std::vector<_Tp, _Alloc>::value_type = std::pair<std::pair<int, int>, int>] push_back(value_type&& __x) ^ /usr/include/c++/4.8/bits/stl_vector.h:919:7: note: no known conversion for argument 1 from ‘std::pair<std::pair<int, double (*)(double)throw ()>, int>’ to ‘std::vector<std::pair<std::pair<int, int>, int> >::value_type&& {aka std::pair<std::pair<int, int>, int>&&}’ user.cpp:84:58: error: no matching function for call to ‘std::vector<std::pair<std::pair<int, int>, int> >::push_back(std::pair<std::pair<int, double (*)(double)throw ()>, int>)’ sus.push_back(make_pair(make_pair(x2, y1),-i)); ^ user.cpp:84:58: note: candidates are: In file included from /usr/include/c++/4.8/vector:64:0, from /usr/include/c++/4.8/bits/random.h:34, from /usr/include/c++/4.8/random:50, from /usr/include/c++/4.8/bits/stl_algo.h:65, from /usr/include/c++/4.8/algorithm:62, from user.cpp:2: /usr/include/c++/4.8/bits/stl_vector.h:901:7: note: void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::pair<std::pair<int, int>, int>; _Alloc = std::allocator<std::pair<std::pair<int, int>, int> >; std::vector<_Tp, _Alloc>::value_type = std::pair<std::pair<int, int>, int>] push_back(const value_type& __x) ^ /usr/include/c++/4.8/bits/stl_vector.h:901:7: note: no known conversion for argument 1 from ‘std::pair<std::pair<int, double (*)(double)throw ()>, int>’ to ‘const value_type& {aka const std::pair<std::pair<int, int>, int>&}’ /usr/include/c++/4.8/bits/stl_vector.h:919:7: note: void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::pair<std::pair<int, int>, int>; _Alloc = std::allocator<std::pair<std::pair<int, int>, int> >; std::vector<_Tp, _Alloc>::value_type = std::pair<std::pair<int, int>, int>] push_back(value_type&& __x)