Eroare de compilare: user.cpp:5:13: error: variable ‘std::ifstream fin’ has initializer but incomplete type ifstream fin("cifra.in"); ^ user.cpp:6:14: error: variable ‘std::ofstream fout’ has initializer but incomplete type ofstream fout("cifra.out"); ^ user.cpp: In function ‘int main()’: user.cpp:13:10: error: ‘k’ was not declared in this scope k=pow(i*i); ^ user.cpp:13:19: error: no matching function for call to ‘pow(int)’ k=pow(i*i); ^ user.cpp:13:19: 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/iostream: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: candidate expects 2 arguments, 1 provided 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:13:19: note: candidate expects 2 arguments, 1 provided k=pow(i*i); ^ 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: candidate expects 2 arguments, 1 provided /usr/include/c++/4.8/cmath:407:3: note: constexpr float std::pow(float, float) pow(float __x, float __y) ^ /usr/include/c++/4.8/cmath:407:3: note: candidate expects 2 arguments, 1 provided user.cpp:14:14: error: ‘k’ was not declared in this scope s=s+k; ^ user.cpp:15:9: error: ‘c’ was not declared in this scope c=s%10; ^ user.cpp: At global scope: user.cpp:26:5: error: expected unqualified-id before ‘return’ return 0; ^