Compilare: user.cpp: In function ‘std::string mutare(std::string)’: user.cpp:11: warning: unused variable ‘l’ user.cpp:11: warning: unused variable ‘r’ user.cpp:11: warning: unused variable ‘s’ user.cpp: In function ‘void ecuatii(std::string)’: user.cpp:60: warning: unused variable ‘j’ user.cpp:60: warning: unused variable ‘s’ user.cpp:60: warning: unused variable ‘t’ user.cpp:60: warning: unused variable ‘st’ user.cpp:60: warning: unused variable ‘dr’ user.cpp:59: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:187: warning: unused variable ‘j’ user.cpp:187: warning: unused variable ‘k’