Compilare: user.cpp: In function ‘void read()’: user.cpp:21:39: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘bool*’ [-Wformat=] fscanf(in, "%d", &read_element); ^ user.cpp:18:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%ld", &nr_of_elements); ^ user.cpp:21:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &read_element); ^