Compilare: user.cpp: In function ‘void read()’: user.cpp:31:44: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[131]’ [-Wformat=] fscanf(in, "%s", &wall_or_freespace); ^ user.cpp:28:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &nr_of_rows, &nr_of_columns); ^ user.cpp:31:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%s", &wall_or_freespace); ^