Eroare de compilare: user.cpp:1:20: error: fstream.h: No such file or directory user.cpp:10: error: ‘ifstream’ does not name a type user.cpp:11: error: ‘ofstream’ does not name a type user.cpp: In function ‘int main()’: user.cpp:18: error: ‘f’ was not declared in this scope user.cpp:30: error: call of overloaded ‘abs(int)’ is ambiguous /usr/include/c++/4.4/cmath:94: note: candidates are: double std::abs(double) /usr/include/c++/4.4/cmath:98: note: float std::abs(float) /usr/include/c++/4.4/cmath:102: note: long double std::abs(long double) user.cpp:39: error: call of overloaded ‘abs(int&)’ is ambiguous /usr/include/c++/4.4/cmath:94: note: candidates are: double std::abs(double) /usr/include/c++/4.4/cmath:98: note: float std::abs(float) /usr/include/c++/4.4/cmath:102: note: long double std::abs(long double) user.cpp:41: error: ‘g’ was not declared in this scope user.cpp:41: error: call of overloaded ‘abs(int&)’ is ambiguous /usr/include/c++/4.4/cmath:94: note: candidates are: double std::abs(double) /usr/include/c++/4.4/cmath:98: note: float std::abs(float) /usr/include/c++/4.4/cmath:102: note: long double std::abs(long double) user.cpp:46: error: ‘g’ was not declared in this scope