Eroare de compilare: user.cpp:2:15: error: math: No such file or directory user.cpp:17:2: warning: no newline at end of file user.cpp: In function 'int main()': user.cpp:6: error: initializer expression list treated as compound expression user.cpp:6: warning: left-hand operand of comma has no effect user.cpp:6: warning: right-hand operand of comma has no effect user.cpp:6: error: invalid conversion from '_IO_FILE*' to 'int' user.cpp:7: error: 'freopen' cannot be used as a function user.cpp:8: warning: format '%d' expects type 'int*', but argument 2 has type 'int' user.cpp:9: error: 'Pi' was not declared in this scope user.cpp:11: error: 'i' was not declared in this scope user.cpp:11: error: 'pow' was not declared in this scope user.cpp:12: error: 'x' was not declared in this scope user.cpp:15: error: expected `}' at end of input user.cpp:15: error: expected `}' at end of input