expresie2.cpp: In function `std::string transform(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)': expresie2.cpp:33: warning: unused variable `int j' expresie2.cpp:33: warning: `int semnnum' might be used uninitialized in this function expresie2.cpp:35: warning: `char sym' might be used uninitialized in this function expresie2.cpp: In function `int main()': expresie2.cpp:106: warning: `int semn' might be used uninitialized in this function