Compilare: user.cpp: In function ‘int Read()’: user.cpp:11: warning: unused variable ‘y’ user.cpp:15: warning: no return statement in function returning non-void user.cpp:9: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:10: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:12: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:13: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void bt(int, int, int, int, int (*)[2], int)’: user.cpp:30: warning: unused variable ‘i’ user.cpp:37: warning: unused variable ‘i’