Compilare: user.cpp: In function ‘int main()’: user.cpp:25:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (p=0;p<=strlen(reteta);p++) ^ user.cpp:33:13: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] nume[i]=NULL; ^ user.cpp:39:14: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] numar[i]=NULL; ^ user.cpp:48:14: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] numar[i]=NULL; ^