Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:68: 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:69: 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:73: 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:86: 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:87: 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:94: 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:9: warning: unused variable ‘a’