Compilare: user.cpp: In function ‘int main()’: user.cpp:24:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(i = 0; B[i]; ++i) ++cntB[ B[i] ]; ^ user.cpp:30:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++cnt[ A[dr] ]; ^ user.cpp:31:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(cnt[ A[dr] ] == cntB[ A[dr] ]) ++need; ^ user.cpp:31:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(cnt[ A[dr] ] == cntB[ A[dr] ]) ++need; ^ user.cpp:36:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(i = 1; i < dr; ++i) ++cntA[ A[i] ]; ^ user.cpp:43:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] --cntA[ A[st++] ]; ^ user.cpp:46:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] --cntB[ A[dr] ]; ^ user.cpp:48:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(cnt[ A[dr] ] > cntB[ A[dr] ] && dr <= N) ++cntA[ A[dr] ], --cnt[ A[dr++] ]; ^ user.cpp:48:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(cnt[ A[dr] ] > cntB[ A[dr] ] && dr <= N) ++cntA[ A[dr] ], --cnt[ A[dr++] ]; ^ user.cpp:48:70: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(cnt[ A[dr] ] > cntB[ A[dr] ] && dr <= N) ++cntA[ A[dr] ], --cnt[ A[dr++] ]; ^ user.cpp:48:88: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(cnt[ A[dr] ] > cntB[ A[dr] ] && dr <= N) ++cntA[ A[dr] ], --cnt[ A[dr++] ]; ^ user.cpp:21:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s %s",A,B); ^