Compilare: user.cpp: In function ‘int main()’: user.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<strlen(c);j++) ^ user.cpp:17:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[c[j]]==0) ^ user.cpp:18:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[c[j]]=j+1; ^ user.cpp:21:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr+=v[c[j]]*p,p*=10; ^ user.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<strlen(c);j++) ^ user.cpp:30:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[c[j]]==0) ^ user.cpp:31:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[c[j]]=j+1; ^ user.cpp:34:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr+=v[c[j]]*p,p*=10; ^