Compilare: user.cpp: In function ‘int StrToDouble(std::string)’: user.cpp:54:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < exp.size(); i++) ^ user.cpp: In function ‘bool FirstAndLastPar(std::string)’: user.cpp:62:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < exp.size()-1; i++) ^ user.cpp: In function ‘nod* Evaluare(std::string)’: user.cpp:88:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < exp.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:26:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.in", "r", stdin); ^ user.cpp:27:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.out", "w", stdout); ^ user.cpp: In function ‘int SearchFunction(std::string, int, int)’: user.cpp:49:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int GetValue(nod*)’: user.cpp:130:1: warning: control reaches end of non-void function [-Wreturn-type] } ^