Eroare de compilare: user.cpp:19:39: error: ISO C++ forbids declaration of ‘operator==’ with no type [-fpermissive] friend operator == (elem a, elem b) ^ user.cpp: In function ‘void readFile()’: user.cpp:46:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] poz[nr][++ pz[nr]] = {i, j}; ^ user.cpp:37:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:44:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &nr); ^