Eroare de compilare: user.cpp:10:13: error: ‘int exp’ redeclared as different kind of symbol int ss = 0, exp; ^ In file included from /usr/include/features.h:367:0, from /usr/include/assert.h:35, from /usr/include/c++/5/cassert:43, from /usr/include/x86_64-linux-gnu/c++/5/32/bits/stdc++.h:33, from user.cpp:1: /usr/include/bits/mathcalls.h:100:1: note: previous declaration ‘double exp(double)’ __MATHCALL_VEC (exp,, (_Mdouble_ __x)); ^ user.cpp: In function ‘int main()’: user.cpp:16:9: error: overloaded function with no contextual type information exp = n; ^ user.cpp:13:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.in", "r", stdin); ^ user.cpp:14:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.out", "w", stdout); ^