Compilare: user.cpp: In function ‘void Afiseaza()’: user.cpp:38:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<strlen(mesaj); i++) ^ user.cpp: In function ‘void Read()’: user.cpp:64:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0; k<strlen(mesaj); ++k) ^ user.cpp: In function ‘void Lee()’: user.cpp:91:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<strlen(mesaj); ++i) ^ user.cpp: In function ‘void Solve2()’: user.cpp:130:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int tablou1=1; tablou1<strlen(mesaj) && valid; tablou1++) ^ user.cpp:145:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int tablou1=1; tablou1<=strlen(mesaj); tablou1++) ^