Compilare: user.cpp: In function ‘void Alfabet()’: user.cpp:11:24: warning: NULL used in arithmetic [-Wpointer-arith] for(i=0;alfabet[i]!=NULL;i++) alf[alfabet[i]]=i+1; ^ user.cpp:11:48: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(i=0;alfabet[i]!=NULL;i++) alf[alfabet[i]]=i+1; ^ user.cpp: In function ‘int Strcmp(char*, char*)’: user.cpp:17:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(alf[s[i]]>alf[t[j]]) return 1; ^ user.cpp:17:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(alf[s[i]]>alf[t[j]]) return 1; ^ user.cpp:18:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(alf[s[i]]<alf[t[j]]) return -1; ^ user.cpp:18:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(alf[s[i]]<alf[t[j]]) return -1; ^ user.cpp: In function ‘int Pivotare(int, int)’: user.cpp:25:7: warning: unused variable ‘piv’ [-Wunused-variable] char piv[6],aux[6]; ^