Compilare: user.cpp: In function ‘void prelucrare()’: user.cpp:17:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(en); i++){ ^ user.cpp: In function ‘int priority(std::string)’: user.cpp:47:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int calc(int, int, std::string)’: user.cpp:83:1: warning: control reaches end of non-void function [-Wreturn-type] } ^