factk.cpp:4: `int exp' redeclared as different kind of symbol /usr/include/bits/mathcalls.h:101: previous declaration of `double exp(double)' factk.cpp: In function `int main()': factk.cpp:23: use of `exp' is ambiguous factk.cpp:4: first declared as `int exp' here /usr/include/c++/3.2.2/cmath:229: also declared as `std::exp' here factk.cpp:27: use of `exp' is ambiguous factk.cpp:4: first declared as `int exp' here /usr/include/c++/3.2.2/cmath:229: also declared as `std::exp' here factk.cpp:27: use of `exp' is ambiguous factk.cpp:4: first declared as `int exp' here /usr/include/c++/3.2.2/cmath:229: also declared as `std::exp' here factk.cpp:32: use of `exp' is ambiguous factk.cpp:4: first declared as `int exp' here /usr/include/c++/3.2.2/cmath:229: also declared as `std::exp' here factk.cpp:32: use of `exp' is ambiguous factk.cpp:4: first declared as `int exp' here /usr/include/c++/3.2.2/cmath:229: also declared as `std::exp' here factk.cpp:33: use of `exp' is ambiguous factk.cpp:4: first declared as `int exp' here /usr/include/c++/3.2.2/cmath:229: also declared as `std::exp' here factk.cpp:33: use of `exp' is ambiguous factk.cpp:4: first declared as `int exp' here /usr/include/c++/3.2.2/cmath:229: also declared as `std::exp' here