an.cpp:8: `int exp[31633]' redeclared as different kind of symbol /usr/include/bits/mathcalls.h:101: previous declaration of `double exp(double)' an.cpp: In function `int main()': an.cpp:31: use of `exp' is ambiguous an.cpp:8: first declared as `int exp[31633]' here /usr/include/c++/3.2.2/cmath:229: also declared as `std::exp' here an.cpp:40: use of `exp' is ambiguous an.cpp:8: first declared as `int exp[31633]' here /usr/include/c++/3.2.2/cmath:229: also declared as `std::exp' here