Compilare: user.cpp: In function ‘int main()’: user.cpp:27:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr[v[i][j]] ++; ^ user.cpp:32:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr[v[i][j]] --; ^ user.cpp:35:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr[v[i][j]] --; ^ user.cpp:39:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr[v[i][j]] --; ^ user.cpp:18:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&n,&m); ^ user.cpp:20:20: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(tmp,3,in); ^ user.cpp:23:30: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(v[i],NMAX+3,in); ^ user.cpp:48:32: warning: array subscript is above array bounds [-Warray-bounds] fprintf(out,"%d ",nr[i]); ^