Eroare de compilare: user.cpp: In function ‘void prelucrare()’: user.cpp:16:30: error: ‘strlen’ was not declared in this scope for(int i = 0; i < strlen(en); i++){ ^ user.cpp: In function ‘int priority(std::string)’: user.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int calc(int, int, std::string)’: user.cpp:82:1: warning: control reaches end of non-void function [-Wreturn-type] } ^