Compilare: main.cpp: In function 'int main()': main.cpp:75:27: warning: array subscript has type 'char' [-Wchar-subscripts] if(!S -> son[c]) ^ main.cpp:76:27: warning: array subscript has type 'char' [-Wchar-subscripts] S -> son[c] = new Trie(); ^ main.cpp:77:27: warning: array subscript has type 'char' [-Wchar-subscripts] S = S -> son[c]; ^ main.cpp:88:39: warning: array subscript has type 'char' [-Wchar-subscripts] while(S != T && !S -> son[v[i]]) ^ main.cpp:90:25: warning: array subscript has type 'char' [-Wchar-subscripts] if(S -> son[v[i]]){ ^ main.cpp:91:30: warning: array subscript has type 'char' [-Wchar-subscripts] S = S -> son[v[i]]; ^ main.cpp:59:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &k); ^