Eroare de compilare in evaluator: user.cpp:1: error: expected constructor, destructor, or type conversion before '<' token user.cpp: In function 'int main()': user.cpp:2: error: 'ifstream' was not declared in this scope user.cpp:2: error: expected `;' before 'f' user.cpp:2: error: 'ofstream' was not declared in this scope user.cpp:2: error: expected `;' before 'g' user.cpp:2: error: 'f' was not declared in this scope user.cpp:2: error: 'p' was not declared in this scope user.cpp:2: error: 'n' was not declared in this scope user.cpp:2: error: 'x' was not declared in this scope user.cpp:2: error: 'r' was not declared in this scope user.cpp:2: error: 'x' was not declared in this scope user.cpp:2: error: 'g' was not declared in this scope user.cpp:2: error: 'r' was not declared in this scope