Compilare: user.cpp: In function ‘void gettimes()’: user.cpp:35:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(reteta); i++) ^ user.cpp: In function ‘void extract()’: user.cpp:91:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(reteta); i++) ^