Compilare: user.cpp: In function ‘int main()’: user.cpp:94:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] while((p!=root)&&(p->fii[s[i]]==NULL)) p=p->fail; ^ user.cpp:95:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(p->fii[s[i]]!=NULL) p=p->fii[s[i]]; ^ user.cpp:95:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(p->fii[s[i]]!=NULL) p=p->fii[s[i]]; ^ user.cpp: In function ‘char nextch()’: user.cpp:24:58: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(pos==BUF_SIZE) fread(buf, BUF_SIZE, 1, fin), pos=0; ^