Eroare de compilare: user.cpp: In function ‘long long int xpow(long long int, long long int, long long int)’: user.cpp:11:13: error: ‘e’ was not declared in this scope if (e % 2) ^ user.cpp:14:9: error: ‘e’ was not declared in this scope e /= 2; ^ user.cpp: In function ‘int main()’: user.cpp:20:13: warning: unused variable ‘i’ [-Wunused-variable] int a,n,i,prod=1; ^ user.cpp:20:15: warning: unused variable ‘prod’ [-Wunused-variable] int a,n,i,prod=1; ^