Eroare de compilare: user.cpp:11:13: error: ‘double div’ redeclared as different kind of symbol double sol, div; ^ In file included from /usr/include/c++/4.8/cstdlib:72:0, from /usr/include/c++/4.8/ext/string_conversions.h:41, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, 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/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/stdlib.h:785:14: error: previous declaration of ‘div_t div(int, int)’ extern div_t div (int __numer, int __denom) ^ user.cpp: In function ‘int main()’: user.cpp:14:9: error: overloaded function with no contextual type information div = (double)(4) / (double)(3); ^ user.cpp:16:34: error: no matching function for call to ‘pow(<unresolved overloaded function type>, int&)’ sol = 3 * s * pow (div, n); ^ user.cpp:16:34: note: candidates are: 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/iosfwd:38, from /usr/include/c++/4.8/ios:38, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:155:1: note: double pow(double, double) __MATHCALL (pow,, (_Mdouble_ __x, _Mdouble_ __y)); ^ /usr/include/i386-linux-gnu/bits/mathcalls.h:155:1: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘double’ In file included from user.cpp:2:0: /usr/include/c++/4.8/cmath:434:5: note: template<class _Tp, class _Up> constexpr typename __gnu_cxx::__promote_2<_Tp, _Up>::__type std::pow(_Tp, _Up) pow(_Tp __x, _Up __y) ^ /usr/include/c++/4.8/cmath:434:5: note: template argument deduction/substitution failed: user.cpp:16:34: note: couldn't deduce template parameter ‘_Tp’ sol = 3 * s * pow (div, n); ^ In file included from user.cpp:2:0: /usr/include/c++/4.8/cmath:411:3: note: constexpr long double std::pow(long double, long double) pow(long double __x, long double __y) ^ /usr/include/c++/4.8/cmath:411:3: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘long double’ /usr/include/c++/4.8/cmath:407:3: note: constexpr float std::pow(float, float)