Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:14:8: error: ‘n’ was not declared in this scope f>>n>>k; ^ user.cpp:14:11: error: ‘k’ was not declared in this scope f>>n>>k; ^ user.cpp:21:23: error: invalid operands of types ‘std::ios_base&(std::ios_base&)’ and ‘std::ios_base&(std::ios_base&)’ to binary ‘operator+’ int mij=(left+right)/2; ^