Compilare: user.cpp: In function ‘int main()’: user.cpp:29:9: warning: unused variable ‘t_ptr’ [-Wunused-variable] task * t_ptr = NULL; ^ user.cpp:30:6: warning: unused variable ‘ax_size’ [-Wunused-variable] int ax_size = 0, ay_size = 0; ^ user.cpp:30:19: warning: unused variable ‘ay_size’ [-Wunused-variable] int ax_size = 0, ay_size = 0; ^ user.cpp:31:6: warning: unused variable ‘x_size’ [-Wunused-variable] int x_size = 0, y_size = 0; ^ user.cpp:31:18: warning: unused variable ‘y_size’ [-Wunused-variable] int x_size = 0, y_size = 0; ^