Compilare: user.cpp: In function ‘int main()’: user.cpp:26:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!ap[ s[i] ]) ++T; ^ user.cpp:27:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++ap[ s[i] ]; ^ user.cpp:37:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(deja[ s[j] ] != idx) --cate[ s[j] ], deja[ s[j] ] = idx; ^ user.cpp:37:54: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(deja[ s[j] ] != idx) --cate[ s[j] ], deja[ s[j] ] = idx; ^ user.cpp:37:68: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(deja[ s[j] ] != idx) --cate[ s[j] ], deja[ s[j] ] = idx; ^ user.cpp:41:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(deja[ s[j] ] != idx) deja[ s[j] ] = idx; ^ user.cpp:41:48: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(deja[ s[j] ] != idx) deja[ s[j] ] = idx; ^ user.cpp:42:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] else ++cate[ s[j] ]; ^ user.cpp:20:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",s); ^