Compilare: user.cpp: In function ‘int main()’: user.cpp:83:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i <= s.size()-1; i++) ~~^~~~~~~~~~~~~ user.cpp:76:12: warning: unused variable ‘lun’ [-Wunused-variable] int T, lun, ok=0, i; ^~~ user.cpp:76:17: warning: unused variable ‘ok’ [-Wunused-variable] int T, lun, ok=0, i; ^~ user.cpp: In function ‘int verificareafisare()’: user.cpp:63:1: warning: control reaches end of non-void function [-Wreturn-type] } ^