Compilare: user.cpp: In function ‘int main()’: user.cpp:15:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] {if(!poz[s[i]]){poz[s[i]]=1;rez[i]=1;} ^ user.cpp:15:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] {if(!poz[s[i]]){poz[s[i]]=1;rez[i]=1;} ^ user.cpp:27:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(c='a';c<='z';c++)fir[c]=-1; ^ user.cpp:30:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fir[s[j]]==-1)fir[s[j]]=j;j++;} ^ user.cpp:30:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fir[s[j]]==-1)fir[s[j]]=j;j++;} ^ user.cpp:32:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fir[c]!=-1 && !viz[c])break; ^ user.cpp:32:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fir[c]!=-1 && !viz[c])break; ^ user.cpp:35:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] viz[c]=1; ^ user.cpp:36:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] j=fir[c]+1; ^ user.cpp:11:8: warning: unused variable ‘vf’ [-Wunused-variable] {int i,vf,n; ^ user.cpp:21:9: warning: variable ‘st’ set but not used [-Wunused-but-set-variable] int j=0,st; ^ user.cpp:23:8: warning: unused variable ‘firs’ [-Wunused-variable] char c,firs; ^