Compilare: user.cpp: In function ‘int main()’: user.cpp:25:32: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[100001]’ [-Wformat=] fscanf(fi,"%s %d " ,&str,&k); ^ user.cpp:47:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] vf[str[i]]++; ^ user.cpp:25:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%s %d " ,&str,&k); ^